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
Bellco Glass, Inc. Septum Stopper, 20mm Blue Butyl Rubber
Manufactured from blue Chlorobutyl. The septum stopper can withstand autoclaving 160 degree Celsius at normal autoclaving times 12-20 minutes. Autoclaving: no higher than 160 degree Celsius. FOR 2048-00150 - ANAEROBIC TUBES. DIMENSIONS: 19.5mm @ TOP, 14mm LONG, 14.5-13.5mm TAPER. MADE IN THE USA. Size: 20mm
West Pharmaceutical Services Inc WEST PHARMACEUTICAL SERVICES INC
NC4014728 13MM SERUM BARRIER STOPPERS
Chemglass Life Sciences Replacement Luer Stopper
Replacement Luer Stopper. Replacement luer stopper for CG-1158 caps.
Chemglass Life Sciences Solid Rubber Stopper, #13, Black
Solid Rubber Stopper, #13, Black. These stoppers are suitable for practically all general laboratory uses. Composition ensures resiliency and pliability over a long period and withstands laboratory conditions without hardening. The dimensions are in accordance with specifications established by the N.B.S. and are low in free sulfur (1/2%). Autoclavable at 250F for 30 minutes under water or steam conditions only (not dry heat). End user must test for their specific application. Diameter: Top (68mm), Bottom (58mm). Length: (25mm).
Chemglass Life Sciences Rubber Stopper, #11-1/2, Two Holes, Black
Rubber Stopper, #11-1/2, Two Holes, Black. Similar to CG-3026 and CG-3027 except with two holes. These stoppers are suitable for practically all general laboratory uses. Composition ensures resiliency and pliability over a long period and withstands laboratory conditions without hardening. The dimensions are in accordance with specifications established by the N.B.S. and are low in free sulfur (1/2%). Autoclavable at 250F for 30 minutes under water or steam conditions only (not dry heat). End user must test for their specific application. Diameter: Top (63mm), Bottom (50mm). Length: (25mm). Diameter of holes: (5mm).
Chemglass Life Sciences Rubber Stopper, #10, One Hole, Black
Rubber Stopper, #10, One Hole, Black. These stoppers are suitable for practically all general laboratory uses. Composition ensures resiliency and pliability over a long period and withstands laboratory conditions without hardening. The dimensions are in accordance with specifications established by the N.B.S. and are low in free sulfur (1/2%). Autoclavable at 250F for 30 minutes under water or steam conditions only (not dry heat). End user must test for their specific application. Diameter: Top (50mm), Bottom (42mm). Length: (25mm). Diameter of hole: (5mm).
Chemglass Life Sciences Solid Rubber Stopper, #1, Black
Solid Rubber Stopper, #1, Black. These stoppers are suitable for practically all general laboratory uses. Composition ensures resiliency and pliability over a long period and withstands laboratory conditions without hardening. The dimensions are in accordance with specifications established by the N.B.S. and are low in free sulfur (1/2%). Autoclavable at 250F for 30 minutes under water or steam conditions only (not dry heat). End user must test for their specific application. Diameter: Top (19mm), Bottom (14mm). Length: (25mm).
Chemglass Life Sciences Solid Rubber Stopper, #6, Black
Solid Rubber Stopper, #6, Black. These stoppers are suitable for practically all general laboratory uses. Composition ensures resiliency and pliability over a long period and withstands laboratory conditions without hardening. The dimensions are in accordance with specifications established by the N.B.S. and are low in free sulfur (1/2%). Autoclavable at 250F for 30 minutes under water or steam conditions only (not dry heat). End user must test for their specific application. Diameter: Top (32mm), Bottom (26mm). Length: (25mm).
Chemglass Life Sciences Solid Rubber Stopper, #9-1/2, Black
Solid Rubber Stopper, #9-1/2, Black. These stoppers are suitable for practically all general laboratory uses. Composition ensures resiliency and pliability over a long period and withstands laboratory conditions without hardening. The dimensions are in accordance with specifications established by the N.B.S. and are low in free sulfur (1/2%). Autoclavable at 250F for 30 minutes under water or steam conditions only (not dry heat). End user must test for their specific application. Diameter: Top (46mm), Bottom (38mm). Length: (25mm).
Enterprise Technology Solutions Sparco Coin Wrapper, 60 lb., Pennies, .50, 1000/PK, Red
Coin Wrappers are folded flat, yet pop open at a squeeze. Made of 60 lb. kraft stock. Precision manufacturing to absolute sizing ensures perfect fit in coin machine stems. Colors conform to ABA standards.
Enterprise Technology Solutions PAP-R Products Flat Coin Wrappers, Pennies, 1000/BX, Red
Flat coin wrappers offer convenient storage. The coin type and total amount capacity is printed on the outside of each wrapper for quick calculations. Retrieve coins easily with the pop-open design. Heavy-duty paper wrappers are color-coded to meet Federal Reserve and American Banking Association standards.
Enterprise Technology Solutions PAP-R Products Penny Tubular Coin Wrap, Nested, 1000/BX, Red
Tubular coin wraps for pennies offer increased durability and burst-resistance with two layers of 57 lb. paper. Crimped/pre-formed in the manufacturing process, one end is folded over to keep the wrap's shape. The crimped-end, no-glue wrappers are nested for efficient shipping and storage. Coin wraps are designed to work in all coin-sorting equipment and color-coded to meet ABA standards.