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Stoppers
Stoppers, also known as bungs, are used to give an airtight seal to laboratory flasks and test tubes by fitting tightly inside a container's neck, preventing material from spilling out. Rubber stoppers are often sized with a stopper number or stopper size, using the stopper's top and bottom diameter dimensions. Sizing can vary among manufacturers. Stoppers are typically designed with a conical shape, but straight and flanged options are also available. Rubber stoppers are available in a solid design or with holes, also known as positions, present on the stopper's top. Positions are used to
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Choice of coarse (C) or extra-coarse (EC) fritted disc
Provides for extremely high chemical purity and low gas permeability. Wheaton™ Ultra Pure Straight Plug Stoppers are manufactured from an ultra pure bromobutyl formulation.
Featuring PTFE-like coatings to prevent reactions due to sample contact with rubber. Wheaton™ Ultra Pure OmniFlex Plus Stoppers are manufactured in a silicone-free environment.
Very low adsorption of the preservatives present in aqueous parenteral solutions - Available in 2-Leg, 3-Leg and Igloo styles.
For the safe and secure closure of flasks, bottles, tubing and other laboratory apparatus. Lenz Laborglasinstrumente™ Pointed Bottom Hollow Stoppers, Hexagonal Plate are manufactured from durable DURAN™ borosilicate glass.
For the safe and secure closure of flasks, bottles, tubing and other laboratury apparatus. Hirschmann Instruments™ Hollow Glass Stoppers are manufactured from clear glass.
Offers higher resilience, flexibility and can withstand many chemical agents in normal laboratory use.
Used as convenient alternative method for closing sterile media flasks and vials instead of cotton plugs.