Stoppers
Stoppers
Stoppers, also known as bungs, are used to give an airtight seal to laboratory flasks and test tubes by fitting tightly inside the neck of the container and preventing material from spilling. Stoppers can be made of glass, cork, rubber, or silicone. They are typically designed with a conical shape, but straight, flanged, and tapered options are also available.
Stoppers are the preferred choice for many applications requiring a tighter seal or a greater degree of chemical resistance. They also provide a good seal when a solution needs to be shaken or mixed without spilling. Stoppers are generally cylindrical in shape and have a tapered bottom end. They may be marked with a stopper number or size on the top and bottom diameters of the stopper. Sizing can vary among manufacturers.
Stoppers are available in a solid design or with holes known as positions placed in the top. Positions allow easy access to the material contained in the sealed vessel by pipettes, tubing, or other equipment without full removal of the stopper.
What Types of Stoppers Are Available?
• Turnover stoppers have external serrations to create an excellent internal seal combined with a flexible turnover sleeve that folds down over the container’s neck to create a double seal
• Serum bottle or vial stoppers have two or three legs with external serrations or straight sides and a flanged top to create an airtight seal
• Straight bromobutyl plug-type stoppers provide a maximum seal for vials and serum bottles with a straight-wall glass finish
• Ultra-pure, straight bromobutyl plug-type stoppers provide high chemical purity and low gas permeability. They offer excellent performance during freeze drying processes such as lyophilization, where stoppers must remain stable during transfer and sublimination phases
• Silicone recessed septa stoppers are non-toxic and have external serrations to create an effective internal seal
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Filtered Search Results
Product Type | Bungs |
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Color | Gray |
Material | Neoprene |
Hardness | 46/55 IRHD |
For Use With (Application) | For laboratory use |
Total Positions | 1 |
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For Use With (Application) | For narrow aperture containers |
Product Type | Stopper |
---|---|
Color | Red |
Material | Natural Rubber |
Hardness | 46/55 IRHD |
For Use With (Application) | For laboratory use |
Fisherbrand™ Solid Rubber Stoppers
Offers higher resilience, flexibility and can withstand many chemical agents in normal laboratory use.
Product Type | Stopper |
---|---|
Color | Red |
Material | Rubber |
For Use With (Application) | Laboratory use |
Fisherbrand™ Silicone Stoppers
For laboratory and/or food testing, industrial masking or educational use.
Product Type | Stopper |
---|---|
Material | Silicone |
Saint Gobain Life Sciences Versilic™ Silicone Stoppers
Versilic™ Stoppers for biology, microbiology and hematology.
Material | Silicone |
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DWK Life Sciences Wheaton™ Flange Style Rubber Stopper
For research and parenteral drug applications
Wheaton™ Rubber Freeze Dry Stoppers
Provides for safe and secure closure of bottles and vials. Wheaton™ Rubber Freeze Dry Stoppers are manufactured from butyl rubber.
For Use With (Equipment) | Diagnostic vials |
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Product Type | Stopper |
Color | Gray |
Material | Butyl Rubber |
Product Type | Stopper |
---|---|
Color | Translucent |
Material | Silicone |
Deutsch Neumann™ Grey Natural Rubber Stoppers
For safe and secure closure of laboratory apparatus. Deutsch Neumann™ Grey Natural Rubber Stoppers are suitable for general use.
Product Type | Stopper |
---|---|
Color | Gray |
Quantity | 1/Ea. |
Material | Natural Rubber |
Saint Gobain Life Sciences Natural Rubber Folding Skirt Stoppers
Use these stoppers for extra protection of tube ends during transport, handling and other operations during which tubes require both internal and end protection. Saint Gobain Life Sciences™ Natural Rubber Folding Skirt Stoppers provide an excellent seal.
Material | Natural Rubber |
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Thermo Scientific™ Filtration Hardware, Accessories, and Spare Parts
Thermo Scientific™ Nalgene™ filtration hardware and accessories can be used in a wide range of applications and in conjunction with our various lines of filtration devices.
Kartell™ Stopper, conical, red rubber, upper\lower diameters 32 x 25mm, height 34mm
Kartell™ Red Rubber Conical Stoppers are suitable for high temperatures and are used in combination with a flask, bottle, or tube.
Fisherbrand™ BS 2775 Series Rubber Stopper With One Hole
Prevents liquid chemical leaks or escape from container.
Product Type | Stopper |
---|---|
Color | Gray |
Material | Neoprene |