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DISTILLING LINK ACC. TO DR. HOWORKA - 1 910 001
DISTILLING LINK ACC. TO DR. HOWORKA
DISTILLING LINK, ACC. TO DR. HOWORKA, WITH PTFE VALVE STOPCOCK, SOCKET ST 14/23, CONE ST 14/23, CONE LATERAL ST 14/23
Distilling link acc. to DR. Howorka - 1 910 002
Distilling link acc. to DR. Howorka
Distilling link, acc. to DR. Howorka, with PTFE valve stopcock, socket ST 29/32, cone St 29/32, cone lateral ST 29/32
Distilling links stopcock PRECISO - 1 910 101
Distilling links stopcock PRECISO
DISTILLING LINKS STOPCOCK 6 MM PRECISO WITH PTFE-STOPCOCK SOCKET ST 14/23 CONE ST 14/23
Distilling links stopcock PRECISO - 1 910 102
Distilling links stopcock PRECISO
Distilling links,stopcock 6 mm PRECISO with PTFE stopcock socket ST 29/32,cone ST 29/32
Microliter pipettes WITOPET expert Single-Channel
Microliter pipettes WITOPET expert Single-Channel

The new microlitre pipette WITOPET expert  offers comfort thanks to an ergonomic handle and effortless pipetting thanks to a smooth-running pipetting button. Its longevity is guaranteed by simple maintenance and calibration. The pipette fulfils standards such as DIN EN ISO 8655 and offers sterile handling and calibration stability, even after repeated autoclaving.

 

Your advantages at a glance:

  • reverse pipetting for accurate and precise intake and delivery of liquids of different viscosities
  • soft grip prevents heat transfer to the internal components, ensuring precise pipetting
  • counter locking mechanism prevents volume changes during pipetting
  • blow-out system allows every last drop to be released
  • new tip cone with high mechanical strength and very good resistance to chemicals
  • interchangeable drops for pipette identification
  • perfected ergonomics for maximum comfort with new, ergonomic handle with soft part
  • particularly light in weight and yet robust
  • minimum effort required when pipetting to avoid excessive strain during pipetting
  • simple and quick maintenance and calibration
  • completely autoclavable for 15 minutes at 121°C (DIN EN ISO 285)
  • excellent calibration stability: no recalibration is required even after multiple autoclaving

*2-10 ml version without tip ejector

Artikelliste

Order number Model Version Autoclavable Color Channels Increment Volume Inaccuracy Imprecision
5 402 002 E Witopet expert 0.1-2.5 μl Variable at 121°C grey 1 0.01 µl 0.1-2.5 μl 12.00% 6.00%
5 402 010 E Witopet expert 0.5-10 μl Variable at 121°C grey 1 0.10 µl 0.5-10 μl 2.50% 1.50%
5 402 020 E Witopet expert 2-20μl Variable at 121°C grey 1 0.10 µl 2-20μl 3.00% 2.00%
5 402 100 E Witopet premium 10-100 μl Variable at 121°C yellow 1 0.50 µl 10-100 μl 3.00% 1.50%
5 402 200 E Witopet expert 20-200 μl Variable at 121°C yellow 1 1.00 µl 20-200 μl 2.00% 0.80%
5 402 901 E Witopet expert 100-1000 μl Variable at 121°C blue 1 5.00 µl 100-1000 μl 2.00% 0.70%
5 402 950 E Witopet expert 0.5-5 ml Variable at 121°C green 1 0.05 ml 0.5-5 ml 2.00% 0.60%
5 402 910 E Witopet expert 2-10 ml Variable at 121°C green 1 0.10 ml 2-10 ml 3.00% 0.60%
Graphite Hotplate Mars 320 - 00829 178320-22
Graphite Hotplate Mars 320

Ideal for:

  • designed specially for ultra-trace metal analysis
  • heavy metal digestion
  • acid digestion
  • heating experiments

 

Features:

  • up to 200°C
  • digital OLED display
  • isostatic graphite heating plate 36 x 22 x 11 cm
  • 2 modes available: continuous mode, countdown mode
  • with high density and excellent thermal conductivity
  • CE certification

 

Safety mechanism:

  • Overheat protection(210°C)
  • Timer options: (1) Countdown timer: 00:01 - 99:59 (HH:MM), (2) Counter: 00:00 (HH:MM)

 

Controller:

  • external controller 18 x 18 x 10 cm

 

 

 

Baths WB Water bath 6/11/22 Liter 100°C ±0,1°C
Baths WB Water bath 6/11/22 Liter 100°C ±0,1°C

Ideal for:

  • water bath for general purpose

Features:

  • user‘s self-compensation function to control difference between real temperature and indicated temperature (±10.0°C)
  • stainless steel bath & lid for superior durability & high thermal efficiency / consistency, dome lid optional
  • digital timer function (99hr 59min): delay time and operation time can be controlled
  • storage function for the set values of temperature and timer
  • backlight LCD display
  • CE-certified and unique serial number for tracing

Safety mechanism:

  • locking mode
  • over- temperature and over-current protection
  • sensor error protection

Controller:

  • digital fuzzy controller with Jog-Shuttle-switch (turn + push)

Artikelliste

Order number Model Width (inner) Length (inner) Height (inner) Width (Outer) Length (outer) Height (outer) Drain valve Capacity Effective space Power consumption Temperature control resolution Temperature range Temperature fluctuation Temperature accuracy Packing size Sensor
DH.WB000106 WB-6 230 V 300 mm 155 mm 150 mm 325 mm 180 mm 260 mm 6 l 300 x 155 x 110 mm 800 W Display 0.1°C, control 0.1°C Room temperature +5°C - 100°C ±1.0°C ±0.1°C 350 x 210 x 310 mm Temperature sensor PT100
DH.WB000111 WB-11 230 V 302 mm 240 mm 150 mm 325 mm 265 mm 260 mm 11 l 302 x 240 x 110 mm 1000 W Display 0.1°C, control 0.1°C Room temperature +5°C - 100°C ±1.0°C ±0.1°C 350 x 300 x 310 mm Temperature sensor PT100
DH.WB000122 WB-22 230 V 500 mm 295 mm 150 mm 535 mm 330 mm 260 mm mounted (Ø9.5 - 11mm) 22 l 500 x 295 x 110 mm 2000 W Display 0.1°C, control 0.1°C Room temperature +5°C - 100°C ±1.0°C ±0.1°C 570 x 360 x 310 mm Temperature sensor PT100
Baths WHB Oil bath 6/11/22 Liter 250°C ±0,1°C
Baths WHB Oil bath 6/11/22 Liter 250°C ±0,1°C

Ideal for:

  • oil bath for general purpose with high temperature

 

Features:

  • user‘s self-compensation function to control difference between real temperature and indicated temperature
  • stainless steel bath & lid for superior durability & high thermal efficiency / consistency
  • digital timer function (99hr 59min): delay time and operation time can be controlled
  • storage function for the set values of temperature and timer
  • backlight LCD display
  • CE-certified and unique serial number for tracing

 

Safety mechanism:

  • locking mode
  • over- temperature and over-current protection
  • sensor error protection

 

Controller:

  • digital fuzzy controller with Jog-Shuttle-switch (turn + push)

 

Artikelliste

Order number Model Width (inner) Length (inner) Height (inner) Width (Outer) Length (outer) Height (outer) Drain valve Capacity Effective space Power consumption Temperature control resolution Temperature range Temperature fluctuation Temperature accuracy Packing size Sensor
DH.WHB00106 WHB-6 230 V 270 mm 180 mm 150 mm 425 mm 305 mm 340 mm mounted 6 l 270 x 170 x 110 mm 1500 W Display 0.1°C, control 0.1°C Room temperature +5°C - 250°C ±3.0°C ±0.1°C 470 x 400 x 500 mm Temperature sensor PT100
DH.WHB00111 WHB-11 230 V 300 mm 250 mm 150 mm 425 mm 490 mm 340 mm mounted 11 l 300 x 250 x 110 mm 2000 W Display 0.1°C, control 0.1°C Room temperature +5°C - 250°C ±3.0°C ±0.1°C 600 x 490 x 500 mm Temperature sensor PT100
DH.WHB00122 WHB-22 230 V 400 mm 300 mm 180 mm 525 mm 490 mm 370 mm mounted 22 l 400 x 300 x 140mm 2500 W Display 0.1°C, control 0.1°C Room temperature +5°C - 250°C ±3.0°C ±0.1°C 600 x 490 x 500 mm Temperature sensor PT100
Baths WCB Circulation water bath 6/11/22 Liter 100°C ±0,1°C
Baths WCB Circulation water bath 6/11/22 Liter 100°C ±0,1°C

Ideal for:

  • biotechnology, clinical, environmental, medical, petroleum & food industry, pharmaceutical and industrial applications
  • connection with evaporators and viscometers is applicable

 

Features:

  • user‘s self-compensation function to control difference between real temperature and indicated temperature (±10.0°C)
  • stainless steel bath & lid for superior durability & high thermal efficiency / consistency
  • storage function for the set values of temperature and timer
  • powerful circulation pump assures temperature uniformity: internal and external circulation
  • storage function for the set values of temperature and timer
  • backlight LCD display
  • CE certified and unique serial number for tracing

 

Safety mechanism:

  • locking mode
  • over- temperature and over-current protection
  • sensor error detection
  • low water level warning and automatic stop function

 

Controller:

  • digital fuzzy controller with Jog-Shuttle-switch (turn + push)

 

Artikelliste

Order number Model Width (inner) Length (inner) Height (inner) Width (Outer) Length (outer) Height (outer) Drain valve Connections Capacity Effective space Pump performance Power consumption Temperature control resolution Temperature range Temperature fluctuation Temperature accuracy Packing size Sensor Flow rate
DH.WCB00106 WCB-6 230 V 300 mm 155 mm 150 mm 330 mm 185 mm 385 mm Circulation nozzle inner Ø7 x outer Ø11mm ( IØ 9 / OØ 12mm silicon tube connection for inner circulation) 6 l 120 x 155 x 150 mm 5 l/min 800 W Display 0.1°C, control 0.1°C Room temperature +5°C - 100°C ±0.2°C ±0.1°C 350 x 210 x 340 mm Temperature sensor PT100 5 l/Min (innen/außen)
DH.WCB00111 WCB-11 230 V 302 mm 240 mm 150 mm 335 mm 275 mm 385 mm Circulation nozzle inner Ø7 x outer Ø11mm ( IØ 9 / OØ 12mm silicon tube connection for inner circulation) 11 l 170 x 240 x 150 mm 5 l/min 1000 W Display 0.1°C, control 0.1°C Room temperature +5°C - 100°C ±0.2°C ±0.1°C 360 x 300 x 420 mm Temperature sensor PT100 5 l/Min (innen/außen)
DH.WCB00122 WCB-22 230 V 500 mm 295 mm 150 mm 540 mm 335 mm 410 mm mounted (Ø9.5 - 11mm) Circulation nozzle inner Ø7 x outer Ø11mm ( IØ 9 / OØ 12mm silicon tube connection for inner circulation) 22 l 372 x 295 x 150 mm 5 l/min 2000 W Display 0.1°C, control 0.1°C Room temperature +5°C - 100°C ±0.2°C ±0.1°C 580 x 380 x 470 mm Temperature sensor PT100 5 l/Min (innen/außen)
Baths WCH Circulation water bath 8/12/22/30 Liter 250°C ±0,1°C
Baths WCH Circulation water bath 8/12/22/30 Liter 250°C ±0,1°C

Ideal for:

  • applications at high temperature
  • biotechnology, clinical, environmental, medical, petroleum & food industry, pharmaceutical and industrial applications
  • connection with evaporators and viscometers is applicable

 

Features:

  • corrosion resistant stainless steel bath with 1.2 mm thickness
  • ceramic fibre insulator of 50 mm thickness and powder-coated steel body
  • user‘s self-compensation function to control difference between real temperature and indicated temperature (±10.0°C)
  • digital timer function (99hr 59min): delay time and operation time can be controlled
  • drain valve mounted and stainless steel flat lid included
  • storage function for the set values of temperature and timer
  • backlight LCD display
  • CE certified and unique serial number for tracing

 

Safety mechanism:

  • overheat and over-current protection
  • sensor error detection
  • locking mode

 

Controller:

  • digital fuzzy controller with Jog-Shuttle-switch (turn + push)

 

Artikelliste

Order number Model Width (inner) Length (inner) Height (inner) Width (Outer) Length (outer) Height (outer) Connections Pressure Capacity Effective space Pump performance Power consumption Temperature control resolution Temperature range Temperature fluctuation Temperature accuracy Packing size Sensor Flow rate
DH.WCH00408 WCH-8 230 V 180 mm 320 mm 155 mm 303 mm 443 mm 569 mm Circulation nozzle inner Ø7 x outer Ø11mm ( IØ 9 / OØ 12 mm silicon tube connection for inner circulation) 5 psi 8 l 180 x 130 x 155 mm 16 l/min, max. lift: 2.8m 1000 W Display 0.1°C, control 0.5°C Room temperature +5°C - 250°C ±0.2°C ±0.1°C 470 x 400 x 500 mm Temperature sensor PT100 16l/Min.
DH.WCH00412 WCH-12 230 V 250 mm 320 mm 155 mm 373 mm 443 mm 569 mm External circulation nozzle inner: Ø10.5mm, outer Ø12.5mm 5 psi 12 l 250 x 130 x 155 mm 16 l/min, max. lift: 2.8m 1500 W Display 0.1°C, control 0.5°C Room temperature +5°C - 250°C ±0.2°C ±0.1°C 470 x 400 x 500 mm Temperature sensor PT100 16l/Min.
DH.WCH00422 WCH-22 230 V 340 mm 440 mm 155 mm 463 mm 563 mm 569 mm External circulation nozzle inner: Ø10.5mm, outer Ø12.5mm 5 psi 22 l 340 x 250 x 155 mm 16 l/min, max. lift: 2.8m 2200 W Display 0.1°C, control 0.5°C Room temperature +5°C - 250°C ±0.2°C ±0.1°C 600 x 490 x 500 mm Temperature sensor PT100 16l/Min.
DH.WCH00430 WCH-30 230 V 340 mm 440 mm 200 mm 436 mm 563 mm 614 mm External circulation nozzle inner: Ø10.5mm, outer Ø12.5mm 5 psi 30 l 340 x 250 x 200 mm 16 l/min, max. lift: 2.8m 2500 W Display 0.1°C, control 0.5°C Room temperature +5°C - 250°C ±0.2°C ±0.1°C 600 x 490 x 500 mm Temperature sensor PT100 16l/Min.
Overhead stirrer HT-DX High-Torque 50-1000 rpm 60,000/90,000 mPas digital internal controller
Overhead stirrer HT-DX High-Torque 50-1000 rpm 60,000/90,000 mPas digital internal controller

Ideal for:

  • all mixing applications in the laboratory
  • specialized for light watery solutions up to high-viscosity fluids

 

Features:

  • maximal 40 / 60 liter
  • 50 - 1,000 rpm
  • maximal viscosity 60,000 / 90,000 mPas
  • worm-geared motor (ratio 3.5:1)
  • digital LCD display
  • smooth start and change of stirring speed while operation
  • storage function for timer and speed
  • impeller height adjustable
  • chrome-plated stainless steel chuck
  • CE certified and unique serial number for tracing

 

Safety mechanism:

  • timer 99h 59min with timer-end signal
  • error status
  • locking mode
  • overload protection
  • overheat protection
  • operation LEDs

 

Controller:

  • Jog-Shuttle controller with touch-button

 

Artikelliste

Order number Model Version Width (Outer) Length (outer) Height (outer) Material Ideal for Controller Torque Moisture range Speed Capacity Stirrer diameter Temperature range Packing size Viscosity (mPas)
DH.WOS01051 HT-50DX unit 230 V High-torque 90 mm 180 mm 130 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids Digital, integrated 180 Ncm at chuck 80% RH 50 - 1000 rpm max. 40 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 320 x 300 x h180 mm max. 60000 mPas
DH.WOS01052 HT-50DX set 230 V High-torque 90 mm 180 mm 130 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids Digital, integrated 180 Ncm at chuck 80% RH 50 - 1000 rpm max. 40 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 320 x 300 x h180 mm max. 60000 mPas
DH.WOS01071 HT-120DX unit 230 V High-torque 90 mm 210 mm 130 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids Digital, integrated 210 Ncm at chuck 80% RH 50 - 1000 rpm max. 60 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 320 x 300 x h180 mm max. 90000 mPas
DH.WOS01072 HT-120DX set 230 V High-torque 90 mm 210 mm 130 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids Digital, integrated 210 Ncm at chuck 80% RH 50 - 1000 rpm max. 60 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 320 x 300 x h180 mm max. 90000 mPas
Overhead stirrer HT-T, High-Torque, 50-1000 rpm, 100000/150000 mPas, digital, external controller
Overhead stirrer HT-T, High-Torque, 50-1000 rpm, 100000/150000 mPas, digital, external controller

Ideal for:

  • all mixing applications in the laboratory
  • specialized for light watery solutions up to high-viscosity fluids
  • convenient for applications where remote control is needed

 

Features:

  • maximal 40 / 60 liter
  • 50 - 1,000 rpm
  • maximal viscosity 100,000 / 150,000 mPas
  • worm-geared motor (ratio 3.5:1)
  • digital LCD display
  • smooth start and change of stirring speed while operation
  • storage function for timer and speed
  • impeller height adjustable
  • chrome-plated stainless steel chuck
  • CE certified and unique serial number for tracing

 

Safety mechanism:

  • timer 99h 59min with timer-end signal
  • error status
  • locking mode
  • overload protection
  • overheat protection
  • operation LEDs

 

Controller:

  • Jog-Shuttle remote controller with touch-button

 

Artikelliste

Order number Model Version Width (Outer) Length (outer) Height (outer) Material Ideal for Controller Torque Moisture range Speed Capacity Stirrer diameter Temperature range Packing size Viscosity (mPas)
DH.WOS01065 HT-50T unit 230 V High-torque 155 mm 180 mm 110 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids, convenient for applications where remote control is needed Digital, remote 300 N cm at chuck 80% RH 50 - 1000 rpm max. 40 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 580 x 340 x h230 mm max. 100000 mPas
DH.WOS01066 HT-50T set 230 V High-torque 155 mm 180 mm 110 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids, convenient for applications where remote control is needed Digital, remote 180 Ncm at chuck 80% RH 50 - 1000 rpm max. 40 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 580 x 340 x h230 mm max. 60,000 mPas
DH.WOS01075 HT-120T unit 230 V High-torque 155 mm 230 mm 110 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids, convenient for applications where remote control is needed Digital, remote 210 Ncm at chuck 80% RH 50 - 1000 rpm max. 60 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 580 x 340 x h230 mm max. 90,000 mPas
DH.WOS01076 HT-120T set 230 V High-torque 155 mm 230 mm 110 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids, convenient for applications where remote control is needed Digital, remote 210 Ncm at chuck 80% RH 50 - 1000 rpm max. 60 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 580 x 340 x h230 mm max. 90,000 mPas
Overhead stirrer HT-AX, High-Torque, 50-1000 rpm, 60,000/90,000 mPas, analog, internal controller
Overhead stirrer HT-AX, High-Torque, 50-1000 rpm, 60,000/90,000 mPas, analog, internal controller

Ideal for:

  • all mixing applications in the laboratory
  • specialized for light watery solutions up to high-viscosity fluids

 

Features:

  • maximal 40 / 60 liter
  • 50 - 1,000 rpm
  • maximal viscosity 60,000 / 90,000 mPas
  • worm-geared motor (ratio 3.5:1)
  • smooth start and change of stirring speed while operation
  • impeller height adjustable
  • chrome-plated stainless steel chuck
  • CE certified and unique serial number for tracing

 

Safety mechanism:

  • overheat protection
  • overload protection
  • operation LEDs

 

Controller:

  • Analog phase controller with control knob

 

Artikelliste

Order number Model Version Width (Outer) Length (outer) Height (outer) Material Ideal for Controller Torque Moisture range Speed Capacity Stirrer diameter Temperature range Packing size Viscosity (mPas)
DH.WOS01251 HT-50AX unit 230 V High-torque 90 mm 180 mm 130 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids Analog, integrated 180 Ncm at chuck 80% RH 50 - 1000 rpm max. 40 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 320 x 300 x h180 mm max. 60000 mPas
DH.WOS01252 HT-50AX set 230 V High-torque 90 mm 180 mm 130 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids Analog, integrated 180 Ncm at chuck 80% RH 50 - 1000 rpm max. 40 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 320 x 300 x h180 mm max. 60000 mPas
DH.WOS01271 HT-120AX unit 230 V High-torque 90 mm 210 mm 130 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids Analog, integrated 210 Ncm at chuck 80% RH 50 - 1000 rpm max. 60 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 320 x 300 x h180 mm max. 90000 mPas
DH.WOS01272 HT-120AX set 230 V High-torque 90 mm 210 mm 130 mm ABS & Aluminium All mixing applications in the laboratory, specialized for light watery solutions up to high-viscosity fluids Analog, integrated 210 Ncm at chuck 80% RH 50 - 1000 rpm max. 60 l Shafts Ø10 mm or less Ambient temperature +0°C - 40°C 320 x 300 x h180 mm max. 90000 mPas
Gloves made of Nitril - 7 302 501
Gloves made of Nitril
Gloves, made of Nitril, size 8, length 400 mm, acc. to EN 420, EN 388 und EN 374 Teil 1-3, far-reaching cut- and puncture stop, silicone-free, anti-bacterial, high resistance against chemicals, oil, grease, solutions and gasoline, temperature resistant -20 to +130°C, Case = 2 pairs
Gloves made of Nitril - 7 302 502
Gloves made of Nitril
Gloves, made of Nitril, size 9, length 400 mm, acc. to EN 420, EN 388 und EN 374 Teil 1-3, far-reaching cut- and puncture stop, silicone-free, anti-bacterial, high resistance against chemicals, oil, grease, solutions and gasoline, temperature resistant -20 to +130°C, Case = 2 pairs
Gloves made of Nitril - 7 302 503
Gloves made of Nitril
Gloves, made of Nitril, size 10, length 400 mm, acc. to EN 420, EN 388 und EN 374 Teil 1-3, far-reaching cut- and puncture stop, silicone-free, anti-bacterial, high resistance against chemicals, oil, grease, solutions and gasoline, temperature resistant -20 to +130°C, Case = 2 pairs
Gloves made of Nitril - 7 302 504
Gloves made of Nitril
Gloves, made of Nitril, size 10, length 400 mm, acc. to EN 420, EN 388 und EN 374 Teil 1-3, far-reaching cut- and puncture stop, silicone-free, anti-bacterial, high resistance against chemicals, oil, grease, solutions and gasoline, temperature resistant -20 to +130°C, Case = 2 pairs
"Witaflo" Angled high vacuum stopcock - 0 290 210
"Witaflo" Angled high vacuum stopcock
Angled high vaccum stopcock, "Witaflo", with PTFE-needle valve, length: 225 mm, bore: 10 mm, borosilicate glass 3.3