Stoppers

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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Stopper Red Rubber 20.5 mm Plug dia., 10 pcs 
Stopper Red Rubber 20.5 mm Plug dia., 10 pcs
Stopper Solid Rubber 33 mm Bottom Diameter 10 pcs 
Stopper Solid Rubber 33 mm Bottom Diameter 10 pcs
Stopper Solid Rubber 13 mm Bottom Diameter 20 pcs 
Stopper Solid Rubber 13 mm Bottom Diameter 20 pcs
Three-hole Twistit™ Rubber Stoppers 
For Use With (Application): Multi-purpose applications. Size: 6. Total Positions: 3. Color: Black.
One-Hole Rubber Stoppers 
Total Positions: 1. For Use With (Application): Inexpensive black natural rubber/SBR blend for general purpose uses. Color: Black. Length (Metric): 2.5 cm
Two-Hole Rubber Stoppers 
Product Type: Tapered Stopper (2 holes). Diameter (Metric) Hole: 0.5 cm Diameter (Metric) Inner: 5 mm. Color: Black.
Wheaton™ Snap-on Style Stoppers for Vials and Serum Bottles 
Diameter (Metric) Inner: 3cm. For Use With (Equipment): Fits 1.5cm I.D., 3cm O.D. mouth of vials and serum bottles Hardness: 50 Durometer. Autoclavable: Autoclavable.
PYREX™ Solid Glass Pennyhead Standard Taper Stoppers 
For Use With (Equipment): Flask and separatory funnel. Length (Metric) Ground Zone: 2 cm. Size: 22. Material: Glass.
Quickfit™ Standard Taper Flat Head Borosilicate Glass Hollow Stopper 
For Use With (Application): Chemical durability and high temperature performance. For Use With (Equipment): Quickfit™ jointed ware and other Glassware having standard ground Glass sockets. Standard Taper Joint: Standard; 34/35. Material: Borosilicate Glass.
Natural Rubber One Hole Stoppers 
Diameter (Metric) Hole: 5mm. Hardness: 46/55 IRHD. Color: Red. Material: Natural Rubber.
Wheaton™ Stoppers for Serum Bottles and Vials: 3-Leg Lyophilization Stopper 
Diameter (Metric) Inner: 2 cm. For Use With (Application): Lyophilization. For Use With (Equipment): Fits 1.3cm I.D., 2cm O.D. mouth of serum bottles and vials Hardness: 50 Durometer.
Foam Plugs for Vials 
Diameter (Metric) Inner: 2.6cm For Use With (Equipment): For 21 to 26mm in diameter vials. Length (Metric): 4.44 cm Quantity: 400/pk.
Plastic Foam Stoppers 
Diameter (Metric) Inner: 4.5 cm For Use With (Equipment): For 3.5 to 4.5cm test tubes and flasks openings Length (Metric): 4.44 cm Autoclavable: Autoclavable.
One-Hole Rubber Stoppers 
Diameter (Metric) Hole: 0.5cm Diameter (Metric) Inner: 5mm. For Use With (Application): Inexpensive black natural rubber/SBR blend for general purpose uses. Length (Metric): 0.25 cm
Two-Hole Rubber Stoppers 
Diameter (Metric) Hole: 0.5cm Diameter (Metric) Inner: 5mm. For Use With (Application): General purpose use. Length (Metric): 2.5 cm
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