2-1/8" x 2-1/2" x 3/16" Rubber O-Rings (12 pcs.)

Diameter: 2-1/8"
Diameter 2: 2-1/2"
Thickness: 3/16"
Material: Rubber
Nominal Size: #330
Type: O-Ring

Box of 12.

An O-ring is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a disc-shaped cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface.