Diameter: 1-1/2"
Diameter 2: 1-11/16"
Thickness: 3/32"
Material: Rubber
Nominal Size: #128
Type: O-Ring

Box of 20.

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.