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 The diaphragm can be punctured with a syringe needle, re-sealing after the needle is withdrawn.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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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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Stoppers, Medium Length
Ace GlassMedium length standard taper stoppers, size 7/15, 10/18 and 12/18 are solid, all others are hollow.
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Pennyhead stoppers are generally used in flasks and separatory funnels.
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Bent Vertical Hose Barb Vacuum Trap
Ace GlassThomas No. 1166W00 Trap, stopper, vacuum, bent vertical tube, 29/32 Thomas No. 1166W01 Trap, vacuum, complete, bent vertical tube, 29/32, 32mm od outer²body, 13mm od inner/side tube,body length 250mm below joint Thomas No. 1166W02 Trap, stopper, vacuum, bent vertical tube,…
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Snorkel Stopper Taper 27
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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SYNTHWARE Septum Stoppers, Sleeve Type
Kemtech AmericaSleeve Type Septum Stopper made from natural white rubber.
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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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Solid PTFE stopper Joint
MilliporeSigmaMachined from solid PTFE with trapezoidal seals for medium to high vacuum performance up to 280C (540F). Synonyms: flask stopper; lab stopper; stoppers
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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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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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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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Stopper, Flask Length, Pennyhead
ChemglassAll sizes are solid with the exception of the #38 (CG-3018-08) which is hollow.
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Glass Pennyhead Stopper, Standard Taper 24/40
DWK Life Sciences (Kimble)Hollow plug type With sealed bottom and vertical penny head
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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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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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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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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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Sleeve Stoppers & Plugs
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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XX2014718
MilliporeSigmaDesigned for use with Millipore stainless steel vacuum filter holders Stopper Size: No. 8 Hole I.D.: 9.5mm (3/8 in.) Silicone rubber construction
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WHEATON® COMPLETEPAK 13 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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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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Two Hole Rubber Stoppers
PlasticoidStandard Grade Sizes No. 00, 0 and 1 have holes 2, 3 and 4 mm diameter, respectively; all other sizes have holes 5 mm diameter
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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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Rubber Stoppers
United Scientific SuppliesRubber Stoppers packaged in convenient 1lb bags. Available in solid, 1 hole, and 2 hole versions.
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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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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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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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Polyethylene Stoppers
ChemglassInexpensive, tapered stopper provides for a tight, leak-proof fit while the top ring permits the stopper to be easily removed. Stoppers are made of yellow Polyethylene
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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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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…