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
Fisherbrand™ White Polyurethane Foam Stoppers
Used as convenient alternative method for closing sterile media flasks and vials instead of cotton plugs.
Length (Metric) | 50 mm |
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Product Type | Stopper |
Color | White |
Quantity | 100/Pk. |
Material | Polyurethane |
For Use With (Application) | Microbiology |
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 |
Product Type | Stopper |
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Color | Red |
Material | Natural Rubber |
Hardness | 46/55 IRHD |
For Use With (Application) | For laboratory use |
Product Type | Bungs |
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Color | Gray |
Material | Neoprene |
Hardness | 46/55 IRHD |
For Use With (Application) | For laboratory use |
Saint Gobain Life Sciences Versilic™ Folding Skirt Stoppers
Silicone biologically neutral Versilic™ Folding Skirt Stoppers.
Product Type | Silicone Stopper |
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Material | Silicone |
Fisherbrand™ Silicone Stoppers
For laboratory and/or food testing, industrial masking or educational use.
Product Type | Stopper |
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Material | Silicone |
Total Positions | 1 |
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For Use With (Application) | For narrow aperture containers |
Fisherbrand™ Polyurethane Foam Stoppers
Formed by polymerization in the presence of a foaming agent.
Product Type | Stopper |
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Quantity | 100/Pk. |
Material | Polyurethane |
Hirschmann™ BIO-SILICO Silicone Stoppers
Excellent for the cultivation of aerobic microorganisms. Hirschmann™ SILICOSEN Silicone Stoppers are specially processed culture plugs with coarse bubbles for preparation, filling and sterilization of culture media.
Product Type | Stopper |
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Color | Orange |
Quantity | 10/Pk. |
Material | Silicone |
For Use With (Application) | For The Preparation And Sterilization Of Culture Media |
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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Fisherbrand™ Natural Rubber Two Hole Stoppers
Used for laboratory purposes.
Product Type | Stopper |
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Color | Red |
Diameter (Metric) Hole | 5mm |
Material | Natural Rubber |
Hardness | 46/55 IRHD |
For Use With (Application) | For laboratory use |
Saint Gobain Life Sciences Silicon Folding Skirt Stopper
Use this stopper for biology, microbiology and hematology, as well as food science, technical, medical and hospital apparatus. Silicon Folding Skirt Stopper is particularly suited for all types of tissue culture work.
Product Type | Silicone Stopper |
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Color | Transparent |
Quantity | 1 Ea. |
Material | Silicone |
Saint Gobain Life Sciences Versilic™ Silicone Stoppers
Versilic™ Stoppers for biology, microbiology and hematology.
Product Type | Silicone Stopper |
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Material | Silicone |
Temperature Range (Metric) | -70°C and +250°C |
Product Type | Stopper |
---|---|
Color | Red |
Material | Natural Rubber |
Hardness | 46/55 IRHD |
For Use With (Application) | For laboratory use |