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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Scienceware® Cup Type Stoppers
SP Bel-ArtOpen at large end, with uniform taper similar to that of rubber stoppers Hollow shell polyethylene construction affords sufficient flexibility to provide secure seal Top edge is reinforced to increase rigidity Can also be inverted for use as loose or tight-fitting caps. Smooth inside walls and…
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Sleeve stopper septa
MilliporeSigmaSleeve 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…
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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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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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Stopper Assortment
PlasticoidMade of soft, pliable, black-compounded stock Length: 25 mm Includes stoppers of solid, one-hole and two-hole styles in sizes 00, 0, 1, 2, 3, 4, 5, 6, 6 1/2, 7 and 8; total of 66 stoppers
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Polyethylene stopper Joint
MilliporeSigmaNonthreaded, wide, thick flanges. Synonyms: flask stopper; flask stoppers; stoppers
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Rubber STOPPER,#0
Bellco GlassA laboratory rubber stopper is mainly used in chemical laboratory in combination with flasks and test tub. Specifications: Material: Rubber Flask Closure Size: 0 Top Diameter: 17mm Bottom Diameter: 13.5mm Length 25mm
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Rubber Stoppers
United Scientific SuppliesConvenient assortments of various sizes of rubber stoppers in 1lb bags.
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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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Precision Seal® rubber septa white
MilliporeSigmaThe 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…
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Stopper No. 19 Cs 6
DWK Life Sciences (Kimble)Replacement part for items that are ground to stopper dimensions. Yellow and blue stopper has a closed bottom. The enlarged flange is designed to protect the neck if the glass object is tipped over.
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Rubber STOPPER,#0
Bellco GlassA laboratory rubber stopper is mainly used in chemical laboratory in combination with flasks and test tub. Specifications: Material: Rubber Flask Closure
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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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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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Stoppers, PTFE-Clad Glass, Spherical
Ace GlassHollow glass spherical stoppers, PTFE-Clad to provide the ultimate in no-jam engagement.
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Assorted 2 Hole Rubber Stoppers
GSC International, Inc.RS-2H-C 1 pound package of assorted 2 hole rubber stoppers. Sizes and quantities are as follows: Size 2: 3 each Size 3: 3 each Size 4: 3 each Size 5: 3 each Size 6: 3 each Size 7: 3 each Size 8: 3 each
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Precision Seal® rubber septa red
MilliporeSigmaThe 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…
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Septum Stoppers, Suba-Seal®
ChemglassSuba-Seal® septa are a flanged stopper with a hollow plug and sleeve extension that folds down over the neck of the vessel. In addition to the pull over sleeve, Suba-Seal® stoppers have a series of annular serrations on the plug portion of the septa. Each of these serrations depress along…
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Rubber STOPPER,#2
Bellco GlassA laboratory rubber stopper is mainly used in chemical laboratory in combination with flasks and test tub. Specifications: Material: Made from Rubber
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Stoppers, Extraction Nut, PTFE
ChemglassPTFE stopper has a Polypropylene extraction nut permitting easy removal of the stopper from the glass outer joint. The 14/20 and 19/22 are solid, while the larger sizes are hollow.
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SYNTHWARE Spherical Glass Penny-Head Stoppers
Kemtech AmericaPenny-Head Stopper,Glass, Sperical Joint, Synthware, Joint: 35 socket, Hollow stopper for use with spherical socket joint.
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Tube, Test, Stoppered
Ace GlassTest tube with interchangeable stopper; 24/40 stopper is hollow, other two solid.
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NMR Stoppers
PlasticoidHollow plug to fit inside bottles, flasks, vials, or tubing with a sleeve to pull over neck to create a double seal .Septa area allows insertion of needle, with excellent re-sealing properties for air sensitive chemistry Standard Compounds include Red and White Natural Rubber, Gray Butyl on…
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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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Serrated natural rubber septa white rubber
MilliporeSigmaClosure 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…
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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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Snap-On Stoppers
DWK Life Sciences (Wheaton)Natural red rubber or gray chlorobutyl/45 material 7 x 13 or 13 x 20 mm sizes
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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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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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Sani-Tech® Silicone Stoppers
Saint Gobain - Bioprocess SolutionsSani-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…
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Anaerobic Tube & stopper 18x150mm
Bellco GlassGas tight tube designed for maintaining anaerobic conditions. Useful for studies involving methane-producing bacteria. Includes gas impermeable blue butyl rubber septum type stopper. Tube is made of Type 1 Class B Borosilicate glass. Specifications: Type 1 Class B Borosilicate Glass Blue…