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® Solid Rubber Stoppers, Black
Supplier: VWR International
These solid, black stoppers contain a high percentage of pure rubber, weigh less than neoprene, and are low in free sulfur (1/2%).
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VWR® Pure Gum Rubber Stoppers, Solid
Supplier: VWR International
These solid, pure gum, amber rubber stoppers contain less free sulfur (max
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VWR® Chlorobutyl Serum and Lyophilization Stoppers
Supplier: VWR International
Stoppers are molded from elastomeric formula 4432/50 Gray. This formula has extremely low levels of organic and metallic extractables and does not contain plasticizers, 2-Mercaptobenzothiazole, nitrosamine precursors, or natural rubber latex.
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Pennyhead Stopper, Solid Glass, Glassco
Supplier: Glassco
Stoppers are made from Borosilicate 3.3 glass.
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PTFE Stoppers, Glassco
Supplier: Glassco
Stoppers are made from PTFE material, and are designed for use with laboratory glassware such as flasks and separatory funnels.
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Rubber Sleeve, Plug-Type Stoppers, Kimble Chase
Supplier: DWK Life Sciences (KIMBLE)
Hollow, plug-type stopper fits into the neck of the apparatus
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KONTES® Pennyhead [ST] Stoppers, Medium Length, Kimble Chase
Supplier: DWK Life Sciences (KIMBLE)
Glass pennyhead stoppers
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Ultrapure Lyophilization Stoppers, Wheaton
Supplier: DWK Life Sciences (KIMBLE)
Wheaton Ultrapure Lyophilization Stoppers are very low moisture adsortion stoppers
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PYREX® Pennyhead Stopper, Corning
Supplier: Corning
PYREX® glass pennyhead stoppers are generally used in flasks and separatory funnels.
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Full Length Hex Head Hollow Glass Stopper, Kimble Chase
Supplier: DWK Life Sciences (KIMBLE)
Hollow glass hex head stopper for use with ungraduated addition funnels with a pressure equalizing line.
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Pluro Stopper, Neoprene, Ace Glass Incorporated
Supplier: Ace Glass
Neoprene stopper for use with filter flasks to support funnels securely.
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Plug Stoppers with Front Seal, Nylon or PTFE, Ace Glass Incorporated
Supplier: Ace Glass
Solid plug stoppers are designed for sealing column ends
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Stopper Assembly
Supplier: SAVILLEX
The stopper assembly is molded from PFA, with a service temperature range of −200 to +260 °C. It is designed to fit standard tapers of laboratory glassware and serves as a connector between Savillex filter assemblies and glass flasks
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Pluro Stopper, Ace Glass Incorporated
Supplier: Ace Glass
Pluro stoppers are nested rings cut from the same stopper, and will give a vacuum-tight fit for all openings within its size range. Silicone stoppers have a higher serviceable temperature of –100 to 450 °F (–73 to 232 °C).
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Round-Head Glass Stoppers, Ace Glass Incorporated
Supplier: Ace Glass
Round-head style glass stoppers are available in a variety of lengths and sizes
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PTFE Stoppers, Ace Glass Incorporated
Supplier: Ace Glass
Standard taper stoppers made of solid PTFE.
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Catalog #: 21905-026
Supplier: Kimberly-Clark
Catalog #: 32934-080
Supplier: Kimberly-Clark
Catalog #: 89039-656
Supplier: VWR International