Closures

Whether protecting the sample from outside contamination or the workplace from the bottled toxic waste, closures guarantee tight and reliable seals. With a vast cap selection for best compatibility with any container, tailoring to specific contents is possible. Temperature resistant models allow any procedure to be completed safely. Available in different finishes, any sensitive chromatography sample is protected. The caps are easy to close with one hand and come in many colors to assist with identification.

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Pouring Rings, Chemglass

Supplier: Chemglass

These pour rings are made of high temperature ETFE (Ethylene Tetrafluoroethylene).

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PYREX® 3-Hole Mobile Phase Delivery Cap, Corning

Supplier: Corning

The delivery cap top has three holes that have 1/4" - 28 threads with 1/8" O.D

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Lyophilization Seals, Electron Microscopy Sciences

Supplier: Electron Microscopy Sciences

The Lyophilization seals come in four styles.

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VACUETTE® Blood Collection Tube Caps, Greiner Bio-One

Supplier: Greiner Bio-One

Snap caps are suitable for recapping all 13mm VACUETTE® tubes.

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WHEATON® Replacement Caps for Valumetric™ Graduated Bottles, DWK Life Sciences

Supplier: DWK Life Sciences (KIMBLE)

High-quality replacement caps for Valumetric™ graduated bottles.

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Snap Cap for 12/13 mm Tubes, Globe Scientific

Supplier: Globe Scientific

Ideal for use with blood drawing tubes, glass test tubes, and plastic culture tubes

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Magnetic Seals w/Septa, 20 mm, preassembled, Restek

Supplier: Restek

Magnetic seals with variable mouth sizes are compatible with a range of vials with 20-millimeter orifices.

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Caps for Wheaton Shell Vials, Electron Microscopy Sciences

Supplier: Electron Microscopy Sciences

Natural.

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Bottle Cap Assembly, Chemglass

Supplier: Chemglass

Bottle cap for GL-45 and GPI-38 threads that permits standard solvent or media bottles to be used as an HPLC reservoir.

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EZCellGene® 38 - 430 Cap Assembly, Overmolded Platinum Cured Silicone Microbore Tubing, Sterile

Supplier: Foxx Life Sciences

The EZCellGene® 38-430 Cap Assembly offers a clean, reliable solution for lab and biopharma facilities seeking to reduce setup time, minimize contamination risk in single-use workflows. Each assembly features VersaCap® technology with two integrated ¹/₁₆" ID hose barbs for vent filtration and fluid transfer.

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EZBio® Silicone Cap System, 83B Overmolded Caps, PP, with Tubing and Diptube, Cap Assembly

Supplier: Foxx Life Sciences

EZBio® Silicone cap system is a bottle cap assembly made from overmolded platinum-cured silicone, compliant with USP Class VI standards. Designed as a cleanroom-compatible closure for pharmaceutical container closures in ISO-certified cleanroom, this joint-free system eliminates fluid entrapment and leak risk while supporting closed-loop fluid transfer, media and buffer handling, and single-use systems.

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Aluminum Seals, Solid-Top, Unlined, WHEATON®

Supplier: DWK Life Sciences (KIMBLE)

For long-term storage of samples

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Optimum Growth® Low Evaporation Cap

Supplier: THOMSON INSTRUMENT CO

Designed for use with Optimum Growth® 1.6, 2.8, and 5 L flasks, these sterile storage caps feature a low-evaporation design to minimize media loss during storage and incubation.