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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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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WHEATON® COMPLETEPAK 20 mm Sterile OmniFlex 3G Igloo Lyo Stopper
DWK Life Sciences (Wheaton)Sterilized, off-the-shelf, ready-to-use (RtU) primary packaging component Focuses your effort on core competencies and reduces lead time Streamlines process and frees up valuable clean room space USP <788>/EP 2.9.19 Particulate Matter in Injections, USP <85>/EP 2.6.1, The…
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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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Serrated natural rubber septa red 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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Rubber Stoppers
United Scientific SuppliesRubber Stoppers packaged in convenient 1lb bags. Available in solid, 1 hole, and 2 hole versions.
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Borosil® Amber Solid Penny Head Glass Stoppers are with Interchangeable Ground Joint and can be used with Volumetric Flask of 5645, 5647 families or for other suitable joints. Manufactured with low extractable quality grade USP Type I, 3.3 Borosilicate Glass confirming to ASTM E438 Class A…
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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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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, Cylindrical, Economy
ChemglassFor use in standard taper outer joints. Economy style with open bottom.
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No. 8 Perforated Stopper
MilliporeSigmaDesigned for use with 1L and 4L vacuum filtering flasks and 47mm vacuum filter holder assemblies 100% Silicone Material Perforated, 1-hole accepts filter holder assemblies and tubing Pack of 5
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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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Snorkel Stopper Taper 22
Glas-ColWith a patented Glas-Col Snorkel Stopper, you'll never again have to take time to open the stopcock and relieve pressure when vigorously shaking a separatory funnel, because our Snorkel Stopper does the task automatically. If you use a Glas-Col shaker, you can simply load the funnels onto it…
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These blue and white 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 tipping. These…
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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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PennyHead Glass Hollow Stoppers
Across InternationalAi 24/40 pennyhead glass hollow stopper. Glass material: high borosilicate glass 3.3.
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Stopper Pressure Relief
Glas-ColWith a patented Glas-Col Snorkel Stopper, you'll never again have to take time to open the stopcock and relieve pressure when vigorously shaking a separatory funnel, because our Snorkel Stopper does the task automatically. If you use a Glas-Col shaker, you can simply load the funnels onto it…
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Polyethylene stopper Joint
MilliporeSigmaNonthreaded, wide, thick flanges. Synonyms: flask stopper; flask stoppers; stoppers
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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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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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Black Rubber Stoppers
GSC International, Inc.A black rubber stopper that is useful in a number of applications. Available in a variety of sizes. Each pack is one pound. Choose from solid, 1 hole, and 2 hole stoppers.
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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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Stopper, Glass
Ace GlassGround glass stopper for 7/10 or 14/20 joint, for use with microscale equipment.
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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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Stopper 0.75 - 1ml Polyet 00
DWK Life Sciences (Kimble)Plug-style needle closures White Polyethylene Designed for shell vials Economical
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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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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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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. The main features of our septa seal: Precision fit: Precision…
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Precision Seal® rubber septa cap white
MilliporeSigmaEngineered for a "push on" fit in NMR tubes and ampules. The unique design provides a penetration point for cannulation and a dual seal inside the tube and on the outer sleeve. Will not break delicate, thin-wall tubing. Manufactured from one certified raw material formulation for absolute…
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Hungate stopper only for use with Hungate tubes. Specifications: Black Butyl Rubber Size: 13MM 250 each per case Dimensions: 13mm at top, to 10mm x 5mm Thick For Use With Hungate Tube: 2047-00125
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Plug, Nylon, HDPE or PTFE, Back seal
Ace GlassA back-seal, solid plug for sealing coulmn ends. Supplied with one FETFE O-Ring.
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Rubber Stoppers
United Scientific SuppliesConvenient assortments of various sizes of rubber stoppers in 1lb bags.