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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Product	Material	Product Type	Stopper Number	Size
Nalgene™ Rubber Stopper, for Vacuum Manifold	Rubber	Rubber Stopper	8	Each
Septum for AcroSeal™, teflon/black elastomer, size: 43 x 3 mm	Teflon,Elastomer	—	—	Each
Septum for AcroSeal™, butyl rubber/teflon, size: 43 x 3 mm, Thermo Scientific Chemicals	Butyl Rubber,Teflon	—	—	Each

Nalgene™ Rubber Stopper, for Vacuum Manifold Thermo Scientific™

Diameter (Metric) Hole: 15.875 mm For Use With (Equipment): Nalgene Vacuum Manifold (Cat. No. DS0345-0001) Material: Rubber. Product Type: Rubber Stopper.

Septum for AcroSeal™, teflon/black elastomer, size: 43 x 3 mm Thermo Scientific Chemicals

Quantity: 10/Ea. Size: 43 x 3mm. Material: Teflon. Material: Elastomer.

Septum for AcroSeal™, butyl rubber/teflon, size: 43 x 3 mm, Thermo Scientific Chemicals Thermo Scientific Chemicals

Quantity: 10/Ea. Size: 43 x 3mm. Material: Butyl Rubber. Material: Teflon.