Sterile / Non-Sterile
Growth Surface Brand
Stem Length (mm)
Top I.D. (mm)
Film Thickess (µm)
Type (Deionization, Distillation, Reverse Osmosis, etc)
Wall Mount or bench top
Analog or Digital
Capacity, L (gal)
Flask Capacity (mL)
Funnel Capacity (mL)
Draw Volume (mL)
- 0.105M buffered sodium citrate (0.5 mL citrate solution, 12.35 mg sodium citrate, 2.21 mg citric acid) (1)
- 0.109M (3.2%) Citrate (1)
- 0.3 mL buffered sodium citrate solution, 0.105M (1)
- 12 mg potassium oxalate, 15 mg sodium fluoride (1)
- 30 mg sodium fluoride (1)
- 4 mg potassium oxalate, 5 mg sodium fluoride (1)
4-Unit or 8-Unit
Stoppers - Test Tubes 11-12 MM (1211Z88) Product Dimensions (l x w x h) : 0x0.463x0.622in Natural Test Tube Stoppers. Low-Density Polyethylene, 11mm-12mm tubes. Single- position tight fitting stopper to fit disposable test tubes. Stoppers - Test Tubes 16 MM (1211Z93) …
Solid Rubber StoppersPlasticoid
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.
Neoprene Rubber StoppersPlasticoid
…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. Not recommended for use with very light oils, such as kerosene.
One-Hole Rubber StoppersPlasticoid
Size 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.
Inexpensive, 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
Rubber StoppersUnited Scientific Supplies
Convenient assortments of various sizes of rubber stoppers in 1lb bags.
Flask length PTFE stopper with color coded handle.
…for added chemical resistance Listed mainly by trade-size, available in solid, one-hole, and two hole rubber stoppers. Uses vary widely, some are outlined below: Carboy Stoppers Crucible Holders Laboratory & Test Tube Stoppers Masking Applications Micro Stoppers Pipe Plugs Tube Stoppers
Snap-On StoppersDWK Life Sciences (Wheaton)
Natural red rubber or gray chlorobutyl/45 material 7 x 13 or 13 x 20 mm sizes
CORK STOPPERSUnited 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.
Neoprene StoppersUnited 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 the…
Rubber StoppersUnited Scientific Supplies
Rubber Stoppers packaged in convenient 1lb bags. Available in solid, 1 hole, and 2 hole versions.
…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 select sizes Custom Sleeve Stopper Compounds available: EPDM, Nitrile, Neoprene, Silicone and Viton®
… 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 concentrated acids, bromine, carbon tetrachloride, butanol, iso-propanol or toluene. Packaged in a bag of 12 stoppers.
Twistit Convertible StoppersPlasticoid
Unique 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)…
Cork StoppersGSC 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…
gray butyl rubber, diam. 20 mm, pkg of 100 ea Synonym(s): PK100 20MM BUTYL SEPTA Amino Acid Sequence: Empirical Formula: Formula Weight: Linear Formula: Purity: Boiling Point: Melting Point: Density: Refractive Index: Storage: Beilstein…
6513C60 stopper was traditionally offered by Thomas for 300/500 mL combustion flasks; glass tip extends 50 mm below ground joint 6513C65 stopper is used for 1,000 mL combustion flasks; glass tip extends 90 mm below ground joint All feature U-shaped platinum gauze with 3 mm opening for insertion…
Ceaprene StoppersGreiner Bio-One
?Gas-permeable Made of water-repellent material
StopperDWK Life Sciences (Kimble)
These stoppers are used as an accessory for microscale threaded Standard Taper 14/10 kits. Pennyhead stopper sizes 10/18 through 19/22 are solid borosilicate glass Sizes 24/25 and larger are hollow borosilicate glass Manufactured from 33 expansion, low extractable borosilicate glass…
Scienceware® Cup Type StoppersSP Bel-Art
…also be inverted for use as loose or tight-fitting caps. Smooth inside walls and flat bottoms permit use as containers. Length of all sizes: 25 mm. Stopper sizes, corresponding generally to standard numbering of laboratory rubber stoppers and top x bottom o.d. in millimeters are shown in listings.
Red-rubber micro stoppersMilliporeSigma
Synonyms: rubber stopper; rubber stoppers; stopper
Hollow Hex Head StoppersChemglass
Hexagonal shaped head of stopper prevents it from rolling off of the bench top. Flat surface will also permit stopper to be inverted and placed on end, thereby preventing possible contamination of ground surface.
Silicone Stoppers with HolesDWK Life Sciences (Kimble)
General purpose single-hole silicone rubber stoppers. Steam autoclavable Opaque yellowish-white color Stoppers are manufactured from pure silicone rubber
Plug-Type Rubber Sleeve StoppersDWK Life Sciences (Kimble)
Uses include outgassing NMR tubes, pressure venting or adding reactants via syringe. Hollow, plug-type stopper fits into the neck of the glassware apparatus Sleeve extension fits over the neck for a secure seal Diaphragm can be punctured with a syringe needle Series 774261 may be…
Serum Bottle StoppersDWK Life Sciences (Wheaton)
…volatile extractables from the rubber component. Butyl stoppers have very low extractable formulations for use with liquid, lyophilized or dry powder products needing protection from oxygen or moisture vapor penetration. Teflon-coated stoppers provide an inert barrier to minimize interaction between…
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…
PennyHead Glass Hollow StoppersAcross International
Ai 24/40 pennyhead glass hollow stopper. Glass material: high borosilicate glass 3.3.
Push On StoppersDynalon
Product Dimensions (l x w x h) : 0x0.619x0.343in Sample Cup Stopper, l ow-density polyethylene . 13mm for use in autoanalyzers.
Gray Chlorobutyl Straight-Sided StoppersDWK Life Sciences (Kimble)
These high quality gray chlorobutyl stoppers are used for research and pharmaceutical packaging applications. Universal gray chlorobutyl formulation passes Japanese, European and United States pharmacopeia testing for globally marketed pharmaceutical products Formulation contains no…
Glass Pennyhead StoppersDWK Life Sciences (Kimble)
Solid pennyhead stopper for volumetric flasks, centrifuge tubes, etc. Meets ASTM Standard E 694.