Stoppers
Leak-proof, solid stoppers seal bottles, flasks, vials, and even tubing to prevent liquids and gases escaping. Multi-hole styles provide the limited flow stability conditions desired in order to prevent air bubble build up. With a slightly tapered design, different diameter sized stoppers are inserted in labware for a snug fit that still allows easy removal. The closures are manufactured in different materials for accurate resistance to harsh contents and can maintain vacuum atmosphere.
VWR®, Stoppers, Neoprene, Green, without Holes
Supplier: VWR Collection
These stoppers contain no free sulphur. It exhibits good resilency and chemical resistance.
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VWR®, Stoppers, PE
Supplier: VWR Collection
Stopper for test tubes Ø 12 to 16 mm, polyethylene, with tongues.
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VWR®, Stoppers, Gum Rubber, with 1 Hole
Supplier: VWR Collection
These stoppers contain less free sulphur and have a lower density than black rubber stoppers. Its composition ensures high resilency and holes facilitates the laboratory usage. Ideal for food grade applications such as beer and wine making used with carboys.
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VWR®, Rubber Stoppers, Black
Supplier: VWR Collection
These stoppers contain high percentage of rubber, less neoprene and free sulphur. Its composition ensures resiliency and pliability over a long period of time.
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VWR®, Drain Stoppers for VWB2 Water Baths
Supplier: VWR Collection
Drain stoppers, VWR®
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VWR®, Glass Stoppers for Standard Ground Joints
Supplier: VWR Collection
Borosilicate 3.3 glass.
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Stoppers for reagent bottle and ground joints, PYREX®
Supplier: Corning
Combination glass stoppers from PYREX®, borsilicate glass with closed bottoms may be used as [ST] joint stoppers and as reagent bottle stoppers. Barrel-shaped head is easy to clean and rotate, side grooves prevent slippage, and flat top allows stopper to stand on head.
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Silicone stoppers with folding skirt, Versilic®
Supplier: Saint Gobain Life Sciences
These stoppers are made of translucent silicone. The stoppers guarantee absolute impermeability, even when the edges of the tubes or glass, metal or plastic containers are imperfect.
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Stoppers, flange plug caps
Supplier: Simport Scientific
PE Plug type push-in caps and 2-position snap caps are made of polyethylene for test tubes with outside diameters of 12 or 17 mm. Dual position caps offer two possibilities: the closed but unsealed position where samples are maintained aerobic for microbiological procedures; and the fully sealed position where the cap is pushed tight to seal the tube for anaerobic use or for storage, transfer and centrifuge applications.
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Stoppers, rubber, with reversible edge
Supplier: Saint Gobain Life Sciences
The white stoppers made of natural rubber guarantee absolute impermeability, even when the edges of the tubes or glass, metal or plastic containers to be sealed are imperfect. They can be punctured and resealed after sampling, even after several uses.
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Silicone stoppers
Supplier: HIRSCHMANN
SILICOSEN® and BIO-SILICO® sterile stoppers are manufactured in a special process and have regular pores, thus making them ideal for the preparation and sterilisation of culture media. The uniform pores and good permeability to air make the stoppers ideally suitable for cultivation of aerobic microorganisms.
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Stopper, PTFE, key-hole, color-coded, PYREX®
Supplier: Corning
PTFE. Ideal for flasks that are grounded to [ST] stopper dimensions.
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Stoppers, flat, diamond-ground, DURAN®
Supplier: DWK Life Sciences
DURAN®, borosilicate glass 3.3, clear.