Lab Stoppers
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.
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Septum Stoppers, Sleeve Type
ChemglassSleeve type stoppers with a hollow plugs and sleeve extensions that folds down over the neck of a vessel, tubing, etc. The diaphragm can be punctured with a syringe needle, re-sealing after the needle is withdrawn. Available in either RED or WHITE rubber.
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Solid Rubber Stoppers
PlasticoidStandard 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.
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Septum stopper, 20mm Blue Butyl Rubber
Bellco GlassManufactured from Blue Chlorobutyl. The septum stopper can withstand autoclaving 160 degree Celsius at normal autoclaving times 12-20 minutes. Specifications: Material: Blue Chlorbutyl Autoclaving: No Higher Than 160 Degree Celsius Size: 20mm Case Quantity: 100
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SYNTHWARE PTFE Stoppers
Kemtech AmericaPTFE Stopper, Standard Taper, Synthware, Various Joint Sizes Available, with handle for easy griping.
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Suba-Seal® septa white rubber
MilliporeSigmaWell-known as the best quality rubber turn-over closure with serrated stopper, Suba-Seal brand is available exclusively from Sigma-Aldrich. Ideal for air and moisture-sensitive chemistry procedures. After piercing with non-coring needle, rubber closes puncture, providing air and moisture tight seal…
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Silicone Stoppers with Holes
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
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One-Hole Rubber Stoppers
PlasticoidSize No. 000, 00 and 0 have hole 3 mm diameter; sizes No. 1 and 2 have hole 4 mm in diameter; all other sizes have hole 5 mm in diameter.
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SYNTHWARE Cap Style Stoppers
Kemtech AmericaCap Style Stopper, Standard Taper, Synthware, Various Joint Sizes Available.
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Poly-Cone Universal Joint Adapter
SP Bel-ArtThis precision-engineered adapter may be cut with a fine-tooth saw or sharp knife into various adapters, such as individual bushings, stirrer bearings, thermometer and gas inlet tube supports, drip-tips, funnels, trap connectors for tubing, etc. Forms a continuous standard taper inside and…
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Stoppers, Lyophilization with Ultra Pure Formulation
DWK Life Sciences (Wheaton)Ultra Pure Lyophilization Stoppers are made from a bromobutyl rubber compound containing the highest level of chemical purity. These stoppers demonstrate a very low level of moisture absorption and are ideal for most lyophilization applications. They are compatible with Water for Injection (WFI)…
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Suba-Seal® septa red rubber
MilliporeSigmaWell-known as the best quality rubber turn-over closure with serrated stopper, Suba-Seal brand is available exclusively from Sigma-Aldrich. Ideal for air and moisture-sensitive chemistry procedures. After piercing with non-coring needle, rubber closes puncture, providing air and moisture tight seal…
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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…
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Neoprene Rubber Stoppers
PlasticoidSolid green Neoprene Withstands exposure to temperatures up to 120°C Usable with petroleum products, vegetable and mineral oils and fats which deteriorate natural rubber Standard length: 26 mm Increased functionality over rubber stoppers at elevated temperatures.…
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United Scientific™ Silicone Stoppers
United Scientific SuppliesSilicone stoppers are particularly useful due to their inert and nonreactive nature. It will not impair the growth of tissue cultures and resistant to most chemical acids and solvents. Stoppers can be steam sterilized at 15 lbs. pressure. Broad working temperature range of –62 to 232°C…
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Twist It Stoppers, Assortment Pack
ChemglassThree 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…
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Stopper Size 19/38
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
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Twistit Convertible Stoppers
PlasticoidUnique seal system allows use as solid or one-, two- or three-hold closures Simplifies stock room inventory Molded of soft, resilient, white natural rubber Seals vacuum-tested to 760 mm Hg Autoclavable, with good shelf life. Sizes #3 & #4 have two holes; #5 - #10 have the (3)…
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Suba-Seal® silicone rubber septa
MilliporeSigma•Translucent silicone rubber septa •Contains no pigments, waxes, or molding agents •Good for high heat applications (200C continuous or 400C intermittent) •Autoclavable for sterile uses •Excellent resistance to deterioration due to sunlight and ozoneTurnover flange grips outside of container…
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Serrated silicone rubber septa bottom
MilliporeSigmaTranslucent 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
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Cork Stoppers
GSC International, Inc.Quality, laboratory grade Cork Stoppers. Available in the following sizes: Size 000 Size 00 Size 0 Size 1 Size 2 Size 3 Size 4 Size 5 Size 6 Size 7 Size 8 Size 9 Size 10 Size 11 Size 12 Size 14 Size 16 Size 20 Size…
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KIMBLE® Full Length Hex Head Hollow Glass Stopper, 24/40
DWK Life Sciences (Kimble)Hollow, hexagonal head, Standard Taper stopper May be set on the flattened top to avoid contamination of the ground surface Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements
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Stopper No. 13 Cs 6
DWK Life Sciences (Kimble)Yellow and blue closed-bottom linear high-density polyethylene stopper to fit in the ground glass neck Enlarged flange on stopper is designed to protect the glass if tipped over Size: 13 Case of 6
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Spherical Cap Type Stopper
ChemglassCap style stopper to be used with apparatus having a spherical ball joint. For clamp see CG-150.
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Assorted 1 Hole Rubber Stoppers
GSC International, Inc.1 pound package of assorted 1 hole rubber stoppers. Sizes and quantities are as follows: Size 00: 4 each Size 0: 4 each Size 1: 4 each Size 2: 4 each Size 3: 4 each Size 4: 3 each Size 5: 3 each Size 6: 3 each Size 7: 3 each
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SYNTHWARE Septum Stoppers, Sleeve Type
Kemtech AmericaSleeve Type Septum Stopper made from natural white rubber.
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Glindemann PTFE sealing rings
MilliporeSigma•This narrow ring seal is an alternative to a PTFE joint sleeve •Greaseless protection for air- and moisture- sensitive compounds •Can be used for prolonged storage under vacuum •Slide easily onto medium and full length taper joints •Can be used with Keck® clip and similar metal joint clips …
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Charlie Plugs are breathable drosophila plugs made from recycled polyester. Polyester is stronger, more breathable and offers excellent mite prevention than cellulose acetate plugs. Charlie plugs leave no clinging fibres they do not retain moisture and are completely made in the USA from recycled…
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Stopper, Michel-Miller
Ace GlassPrecision made PTFE stoppers for use at either end of the 5795 Michel-Miller, 5820 Columns or all 7644 Ace-Threds when a leaktight seal without the use of O-Rings is desired. Use 5846- 52 and 7855-829 for #50 size.
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Rubber Stoppers
United Scientific SuppliesConvenient assortments of various sizes of rubber stoppers in 1lb bags.