Flask Closures
Flask Closures
Thermo Scientific™ Nunc™ Sterile Flask Replacement Filter Caps
Allow constant airflow and minimize chance of contamination by using individually packed Thermo Scientific™ Nunc™ Sterile Flask Replacement Filter Caps.
Thermo Scientific™ Caps for Nunclon™ Delta Flasks
Protect your valuable cell culture samples. These caps for Thermo Scientific™ Nunclon™ Delta Flasks are offered in two styles—vent/close, filter—to meet application needs.
Fisherbrand™ Flask Covers
Cut down on evaporation.
Corning™ Falcon™ Vented Screw Caps for Flasks, Sterile
Designed for use with Falcon 25-, 75-, and 175cm2 flasks
PYREX™ Polyethylene Snap Caps for Volumetric Flasks

Economical closure for some volumetric flasks
PYREX™ Class A Flasks Replacement Screw Caps
For 10-207 Series Class A flasks
Corning™ Universal CellSTACK™ Caps


For filling, venting, and manipulation
Corning™ ProCulture Gas Venting Cap With PTFE Filter For Vertical Sidearm Flasks
Can be used with larger Spinner Flasks with vertical sidearms to enhance productivity of cell culture
PYREX™ Polypropylene Caps for Erlenmeyer Flasks


As supplied with Pyrex™ Brand Media/Solution bottles. Choose orange caps for temperatures to 140°C (284°F), red caps for temperatures to 180°C (356°F).

PYREX™ GL45 Screw Cap with Plug Seal


Nonsterile, reusable caps
Corning™ ProCulture Gas Venting Cap for Vertical Sidearm Flasks
Used to provide gases into larger spinner flasks with vertical sidearms during cell culture
Corning™ Direct Overhead Drive 120mm Center Cap Assembly
For use with Proculture™ spinner flasks
Corning™ Universal CellSTACK™ Caps

For filling, venting, and manipulation
Corning™ Universal CellSTACK™ Caps


For filling, venting, and manipulation
Corning™ Sterile Disposable Spinner Flask Vent Cap


Designed to fit Corning 500mL, 1L and 3L disposable spinner flasks.
Corning™ Universal CellSTACK™ Caps

For filling, venting, and manipulation
PYREX™ Polypropylene Flask Closures

Designed for culture tubes and flasks with long rimless necks
DWK Life Sciences Kimble™ Kimax™ Polyethylene Snap Caps
Snap cap tight fit prevents leakage or evaporation
Promotions are available
Kimble™ Polyethylene Snap Cap

Snap cap tight fit prevents leakage or evaporation.
Thomson Instrument Company Inversion Transfer Cap, 1/8" Barb Connection, Sterile | Use w/ 931116 | CS4
Thomson Instrument Company Optimum Growth™ Inversion Transfer Caps (patented) utilize gravity feed for simple aseptic transfer of media or suspension cells to cell bags, bioreactors or flasks (from any manufacturer). Specific Inversion Transfer Caps are designed to work with 1.6L, 2.8L and 5L Thomson Optimum Growth™ Flasks. Simply replace the vented flask cap included with each flask with the correct Inversion Transfer Cap and connect to your vessel of choice. Transfer connections available include male Luer lock, 7/16” OD male quick connect, ¼” OD barb quick connect or plugged end ideal for tube fusing. These products are individually packaged and sterilized for immediate use. The Optimum Growth system feature a unique low shear baffle design which increases aeration while maintaining cell viability and improving yields. Thomson Instrument Company manufactures its products in the USA to assure same day shipping.

Thomson Instrument Company Inversion Transfer Cap, 2' Tubing, weld to C-Flex 16, Sterile | Use w/ 931116 | CS4
Thomson Instrument Company Optimum Growth™ Inversion Transfer Caps (patented) utilize gravity feed for simple aseptic transfer of media or suspension cells to cell bags, bioreactors or flasks (from any manufacturer). Specific Inversion Transfer Caps are designed to work with 1.6L, 2.8L and 5L Thomson Optimum Growth™ Flasks. Simply replace the vented flask cap included with each flask with the correct Inversion Transfer Cap and connect to your vessel of choice. Transfer connections available include male Luer lock, 7/16” OD male quick connect, ¼” OD barb quick connect or plugged end ideal for tube fusing. These products are individually packaged and sterilized for immediate use. The Optimum Growth system feature a unique low shear baffle design which increases aeration while maintaining cell viability and improving yields. Thomson Instrument Company manufactures its products in the USA to assure same day shipping.

Thomson Instrument Company Inversion Transfer Cap, 7/16" Male Connection, Sterile |Use w/ 931116 | CS4
Thomson Instrument Company Optimum Growth™ Inversion Transfer Caps (patented) utilize gravity feed for simple aseptic transfer of media or suspension cells to cell bags, bioreactors or flasks (from any manufacturer). Specific Inversion Transfer Caps are designed to work with 1.6L, 2.8L and 5L Thomson Optimum Growth™ Flasks. Simply replace the vented flask cap included with each flask with the correct Inversion Transfer Cap and connect to your vessel of choice. Transfer connections available include male Luer lock, 7/16” OD male quick connect, ¼” OD barb quick connect or plugged end ideal for tube fusing. These products are individually packaged and sterilized for immediate use. The Optimum Growth system feature a unique low shear baffle design which increases aeration while maintaining cell viability and improving yields. Thomson Instrument Company manufactures its products in the USA to assure same day shipping.

Thomson Instrument Company AirOtop Enhanced Seal, Sterile | Use w/ 931141 | CS100
Thomson Instrument Company AirOtop™ Enhanced Flask Seals are a component of the Ultra Yield System designed to increase cell culture yields. These 0.2um seals are sterile, hydrophobic, disposable, allow for high gas exchange and are resealable for up to approximately 24 hours. Multiple sizes are available to keep all your flasks covered and are also compatible with glass flasks. Organisms tested exhibited increased cell density, a more neutral media pH and increased gas exchange rates. When AirOtop is used with the Ultra Yield and Plasmid+ media, customer data has shown yields increase by 610%. See Thomson Instrument Company application notes for experiment data. Thomson manufactures its products in the USA to assure same day shipping.

Chemglass Life Sciences BOND CLS,STAND,9MM,BLU,100/PK

Bonded Closure, Standard, 9mm, Blue, Open Hole, 0.40" PTFE/ Silicone with Slit, Pack of 100

Corning Gentest 3P CELLS HU OATP1B1 1A 10E7
Corning TransportoCells Organic Anion-transporting Polypeptide; Wild Type (388A), 10 Million Cells

Chemglass Life Sciences 5NECK REACTION VESSEL LID150MM

5-Neck Reaction Vessel Lid, 150mm Schott Flange, CN 24/40, 3-SN 24/40 Vertical, 1-SN 24/40 Angled 10°

Thomson Instrument Company Bidirectional Transfer Cap, 2' Tubing Weld to C-Flex 16, Sterile | Use w/ 931113 | CS8
Thomson Instrument Company Optimum Growth™ Bidirectional Transfer Caps (patented) with downstem, utilize a peristaltic pump for easy aseptic transfer of media or cells into or out of cell bags, bioreactors, and flasks (from any manufacturer). Specific Bidirectional Transfer Caps work with the 1.6L, 2.8L and 5L Thomson Optimum Growth™ Flasks and your peristaltic pump. Simply replace the vented cap included with each flask with the appropriate Transfer Cap and connect to your vessel of choice. Transfer tubing comes fitted with male Luer lock, or a plugged end ideal for tube fusing. These products are individually packaged and sterilized for immediate use. The Optimum Growth system feature a unique low shear baffle design which increases aeration while maintaining cell viability and improving yields. Thomson Instrument Company manufactures its products in the USA to assure same day shipping.

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