3-1/2″ x 3-3/4″ x 1/8″ O-Rings (4 pcs.)
Diameter: 3-1/2″ Diameter 2: 3-3/4″ Thickness: 1/8″ Type: O-Ring Box of 4. 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.