R-337 Square O-Ring (ID: 3", CS 3/16", OD 3 3/8"), 24PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces..
Square O-Ring (ID:26 mm, CS:2 mm, OD:30 mm), 12PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces..