Lab Stoppers

Lab stoppers are essential for maintaining the integrity and safety of experiments in laboratory settings. These small yet vital components play an essential role in sealing and securing various lab containers, ensuring the stability of samples and reagents. This category includes a variety of stoppers, each tailored for specific needs. Rubber stoppers, known for their flexibility and tight seal, are perfect for general use in flasks and test tubes. Convertible stoppers offer versatility, easily adapting to different lab apparatuses. Color-coded stoppers enhance lab organization, allowing for quick sample identification and reducing the risk of cross-contamination. Lab stopper options include plug-type rubber sleeve stoppers, which provide a secure fit for more complex laboratory setups, ensuring airtight conditions for sensitive experiments. Lab stoppers, ranging from simple rubber variants to specialized butyl stoppers and glass stoppers, are indispensable for ensuring the safety and accuracy of laboratory work. Their ability to effectively seal and protect makes them an essential in any lab environment. Thomas Sci also offers a variety of lab flasks, tubes, and caps.

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  • United Scientific Supplies

    Neoprene stoppers can be used in areas where rubber would be attacked by reagents or solvents. Synthetic neoprene stoppers have good resiliency and shelf-life. They withstand petroleum products and oils as well as most inorganic acids and bases. Stopper are green for easy identification. Sold by…

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    West Pharmaceutical Services

  • Standard Grade Sizes No. 00, 0 and 1 have holes 2, 3 and 4 mm diameter, respectively; all other sizes have holes 5 mm diameter

  • MilliporeSigma

    Sleeve stopper septa are manufactured from pure natural rubber for excellent resealability when used for cannulation techniques or from FKM rubber for high chemical resistance. Natural rubber septa are available in red and white colors and a soft rubber formulation that contains no fillers or…

  • The recommended choice for use with organic chemicals and solvents, pressure applications, and cannulation techniques:Precision Seal septa are designed specifically for the rigorous requirements of chemical applications. •Precision fit: Precision Seal septa have a longer, tapered plug that seats…

  • Free from volatiles or extractable substances which may impair cell growth; for use at temperatures from -80 to 450°F Can be steam sterilized at 15 lbs. pressure, making them suitable for culture tubes containing pathogenic materials Length: 25 mm Not recommended for use with…

  • DWK Life Sciences (Wheaton)

  • Similar to CG-3026 and CG-3027 except with two holes. These stoppers are suitable for practically all general laboratory uses. Composition ensures resiliency and pliability over a long period and withstands laboratory conditions without hardening. The dimensions are in accordance with…

  • Flanged type stopper with a hollow plud and sleeve extension that folds down over the neck of vessel, tubing, etc. The diaphragm can be punctured with a syringe needle, resealing after need is withdrawn.

  • GSC International, Inc.

  • DWK Life Sciences (Kimble)

    Top Stoppers for Incubation Flasks. Rubber stoppers for flask top and sidearm provide a secure double seal Top stopper has off-center hole for insertion of center well Fits both 10 and 25 mL flasks

  • DWK Life Sciences (Wheaton)

    Natural red rubber or gray chlorobutyl/45 material 7 x 13 or 13 x 20 mm sizes

  • A front-seal, solid plug for sealing column ends. Supplied with one FETFE o-ring.

  • DWK Life Sciences (Kimble)

    General purpose single-hole silicone rubber stoppers. Steam autoclavable Opaque yellowish-white color Silicone stoppers with holes are manufactured from pure silicone rubber

  • DWK Life Sciences (Wheaton)

  • MilliporeSigma

    Sleeve stopper septa are manufactured from pure natural rubber for excellent resealability when used for cannulation techniques or from FKM rubber for high chemical resistance. Natural rubber septa are available in red and white colors and a soft rubber formulation that contains no fillers or…

  • Conforms to standard-taper specifications as outlined in ASTM E 675. Synonyms: glass stopper; glass stoppers; stoppers Legal Information: Aldrich is a registered trademark of Sigma-Aldrich Co. LLC

  • These blue and white No. 13 PYREX® stoppers are made from linear high-density polyethylene and have closed bottoms to conform to Standard Taper stopper dimensions. The three rings on the plug provide an efficient seal. This improved design fully protects the neck in the event of accidental…

  • Borosil® Plastic Polypropylene Flat Head Stoppers are with Interchangeable Joint and can be used with Volumetric Flask of 5645, 5647 families or for other suitable joints. Polypropylene available in sizes of 7/16 to 34/35. In collaboration with Borosil Glass Works, Foxx Life Sciences…

  • Translucent silicone rubber septa:. Contain no pigments, waxes, or molding agents. Good for high heat applications (200C continuous or 400C intermittent). Autoclavable for sterile applications. Excellent resistance to deterioration due to sunlight and ozone

  • United Scientific Supplies

    These grade XXX tapered cork stoppers are an excellent choice for general laboratory use. They are effective for both liquid and solid mediums, and offer light weight, resilience and compressibility. Chemically inert and moisture resistant. Sold as packs of 100.

  • Three twist-off seals permit easy conversion from a solid to a one, two, or three-hole stopper. Soft, resilient, natural rubber demonstrates exceptional aging characteristics and withstands repeated autoclaving. Autoclavable at 250°F for 30 minutes under water or steam conditions only (not…

  • DWK Life Sciences (Kimble)

    Stoppers are used with laboratory glassware such as flasks and separatory funnels. Sizes Standard Taper 10/30 through Standard Taper 19/38 are solid Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements

  • Saint Gobain - Bioprocess Solutions

    Sani-Tech® ultra-pure platinum-cured silicone stoppers outperform standard neoprene and rubber stoppers in critical laboratory and process applications. These long-life silicone stoppers are fully autoclavable and sterilizable and will not crack, spallate or invoke particle migrations that can…

  • DWK Life Sciences (Wheaton)

    Sleeve stoppers are plug stoppers with fold-over skirts Used on serum vials and other crimp-finish containers that do not require aluminum seals or overcaps Can be used as an injection site for multiple dose entry Manufactured from natural red rubber, a general-purpose rubber…

  • GSC International, Inc.

    1 pound pack of assorted solid rubber stoppers. Sizes and quantities are as follows: Size 00: 4 each Size 0: 4 each Size 1: 4 each Size 2: 3 each Size 3: 3 each Size 4: 3 each Size 5: 3 each Size 6: 3 each Size 7: 3 each

  • Vee Gee Scientific

    SIBATA 47mm Filtration Filter Holder Components are available as replacement components, or to create a customized filter holder. Available with fritted glass support base for general and biological applications, or with removable stainless steel screen support base and PTFE gasket for ultraclean…

  • Standard Grade Size No. 000 is 18 mm long; sizes No. 00 to No. 13 are 25 mm long. Sizes No. 13 1/2, 14 and 15 are 35 mm, 36 mm and 39 mm respectively.

  • Closure has a turnover flange molded to grip outside of container neck, promoting a double seal in conjunction with annular serrations on a hollow plug. Annular serrations depress themselves against the inside wall of the bottle neck, making each serration a suction sealing point.Note: For extra…

  • Penny-Head Stopper, Glass, Solid, Synthware, Various Joint Sizes Available.

  • Flask length standard taper stoppers, size 9 is solid, all others are hollow.

  • Sleeve Type Septum Stopper made from natural white rubber.

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