Test tube closures ensure samples do not leak or are contaminated by providing a reliable seal. Securely mix or store small samples with these tops that allow one-handed sealing. Offered in a variety of colors, identification is made easier. Closures come in screw and snug-fit plug designs to fit any test tube opening style. Resistant to high temperatures, the versatile test tube closures can withstand heating applications while the chemical resistance guarantees limitless sample compatibility.

VWR® Dual-Position Caps, PE

Supplier: VWR International

White caps for use with VWR® and most popular brand disposable culture tubes.

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VWR® Lanced and Unlanced Cylindrical Closures, Stainless Steel

Supplier: VWR International

Non-contaminating, noncorrosive stainless steel cylindrical closures are available in lanced and unlanced formats.

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VWR® Plug-Type Caps, PE

Supplier: VWR International

Disposable caps are for 12 x 75 mm and 13 x 100 mm culture tubes.

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VWR® Flat Caps for Screw Cap Microtubes

Supplier: VWR International

Flat caps with O-ring for use with VWR® screw cap microtubes only (series 76417-xxx).

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VWR® Caps

Supplier: VWR International

Safe-T-Flex caps feature a unique, flexible, over-locking design that locks securely on the outside of the tube lip and can be removed with one hand.

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Polypropylene Closures

Supplier: DWK LIFE SCIENCES S. DE R.L. DE MX

Polypropylene closures for 13 and 20 mm culture tubes.

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Axygen® Microcentrifuge Screw Caps, Corning

Supplier: Corning

These caps are compatible with all Axygen Scientific screw top microcentrifuge tubes, including both skirted and nonskirted variations of the 0.5 ml, 1.5 ml, and 2 ml microcentrifuge tubes.

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SP Wilmad-LabGlass Disposable NMR Tube Caps, SP Industries

Supplier: SP Industries

Manufactured from high quality polyethylene or ethylene vinyl acetate to ensure a tight seal.

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Stainless Steel Closures, Ace Glass Incorporated

Supplier: ACE GLASS, INC.

These closures are designed for use with culture tubes and flasks and are available with or without gripping finger indents

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Corning® Cap, Phenolic, PTFE Liner

Supplier: Corning

This cap is fabricated of a resin specially formulated to resist the effects of temperature and steam in autoclaving.

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KIM-KAP® Caps, Disposable, Polypropylene, Kimble Chase

Supplier: DWK LIFE SCIENCES S. DE R.L. DE MX

These KIM caps are designed to fit culture tubes with outer diameters ranging from 13 mm to 38 mm.

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Corning® Disposable Phenolic Threaded Screw Cap with Rubber Liners, Corning

Supplier: Corning

These disposable Corning® caps are made from phenolic resin and are autoclavable at 121°C

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Corning® Advanced Polyethylene CentriStar™ Caps for Centrifuge Tubes

Supplier: Corning

The CentriStar™ cap has a easy-on/easy-off flat top and offers advanced ergonomics with its wider knurls and roll-over edge design for easier gripping.

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PYREX® Snap Caps, Polyethylene, Corning

Supplier: Corning

These blue caps provide an economical closure for certain volumetric flasks (see 29610-004 and -285 series).

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Phenolic Screw Thread Closure, Kimble Chase

Supplier: DWK LIFE SCIENCES S. DE R.L. DE MX

Caps have mineral-filled phenolic material to withstand the effects of repeated autoclaving.

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Polypropylene Screw Caps, Linerless, Kimble Chase

Supplier: DWK LIFE SCIENCES S. DE R.L. DE MX

Polypropylene caps feature one-piece construction with a seal achieved by a unique interior design.

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Tiered Plug Stopper Closures, Polyethylene, Globe Scientific

Supplier: GLOBE SCIENTIFIC INC

Polyethylene flanged plug caps provide exceptional leak-resistance in test tubes, centrifuge tubes, and round cuvettes

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Microcentrifuge Tube Lid Locks

Supplier: UNITED SCIENTIFIC SUPPLIES

Secure caps to lids of microcentrifuge tubes with these autoclavable locks.

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Flanged Plug Caps, 16 mm, Globe Scientific

Supplier: GLOBE SCIENTIFIC INC

This line of polyethylene flanged plug caps provides exceptional leak-resistance in test tubes, centrifuge tubes, and round cuvettes.

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Identi-Plug® Plastic Foam Plugs, Jaece

Supplier: JAECE INDUSTRIES INC

These reusable plastic white foam plugs are for use with test tubes and flasks.

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Spectra/Por® Closures for Dialysis Membrane Tubing, Spectrum® Laboratories

Supplier: REPLIGEN CORPORATION

These are used in combination with a standard closure for a vertical use of the dialysis tubing and a magnetic stirrer for continuous stirring of the tubing.