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
Ace Glass, Inc. 50/50 Bent Vertical Hose Barb Vacuum Trap Stopper
50/50 Bent Vertical Hose Barb Vacuum Trap Stopper
Ace Glass, Inc. Trap, stopper, vacuum, bent vertical tube, 29/42, 13mm inner& side tube OD
Trap, stopper, vacuum, bent vertical tube, 29/42, 13mm inner& side tube OD
Ace Glass, Inc. Septa, white rubber, sized for 8mm OD tubing, pk/72
Septa, white rubber, sized for 8mm OD tubing, pk/72
Ace Glass, Inc. Septa, white rubber, sized for 9-12mm OD tubing, pk/144
Septa, white rubber, sized for 9-12mm OD tubing, pk/144
Chemglass Life Sciences M6 Blind Stopper, for Bio Reactors
M6 Blind Stopper. Stoppers can be used to close off any of the unused openings in the head plate. The M6, M10 and M12 sizes are fitted into the head plate from the inside, leaving a flat surface, while the M18, M27 and G3/4 are threaded into the ports from the outside.Like-for-like replacement parts for Applikon Biotechnology and Broadley-James brands of bioreactors.Applikon is a registered trademark of Applikon Biotechnology, Inc. Broadley-James and Broadley-James Corporation are registered trademarks of Broadley-James Corporation.
Chemglass Life Sciences Stopper Only, Butyl Rubber, 5.4mm OAH
Stopper Only, Butyl Rubber, 5.4mm OAH. For CLS2408 Hungate Anaerobic Tubes.
Foxx Life Sciences Borosil® Plastic Polypropylene Stopper for Volumetric Flasks with Interchangeable Joint 34/35, 50/CS
Borosil® Plastic Polypropylene Flat Head Stoppers are with Interchangeable Joint and can be used with Volumetric Flask of 5645, 5647 families or for other suitable joints. Polypropylene Available in sizes of 7/16 to 34/35. In collaboration with Borosil Glass Works, Foxx Life Sciences is proud to bring the outstanding quality of Borosil® Type 3.3 Borosilicate glassware to North America for the first time. Manufactured from the same USP Type I, Borosilicate glass that North American scientists have come to trust, Borosil® Laboratory Glassware offers unparalleled mechanical strength, clarity, and reliability at competitive prices. And thanks to a unique annealing process, Borosil® Glassware is stress-free and incredibly resistant to thermal shock.
Grainger WallPlate Blank 2 Hole White
The Monoprice Wall Plate is a single-gang Decora style wall plate made of high-impact plastic in white color. It features a flat design with rounded corners and measures 4.69 x 2.75 x 0.12 inches. This wall plate has a smooth finish and includes 1 Decora opening, allowing the installation of a single Decora rocker switch, outlet, jack or other device. It can be installed over any standard single-gang US electrical box and is UL and CUL listed. The wall plate is designed for indoor use.
Enterprise Technology Solutions 40-Sheet Ez Squeeze Three-Hole
40-Sheet Ez Squeeze Three-Hole Punch 9/32 Holes Black/silver
Enterprise Technology Solutions 40-Sheet Ez Squeeze Two-Hole P
40-Sheet Ez Squeeze Two-Hole Punch 9/32 Holes Black/silver
