.Square O-Ring (ID:11 mm, CS:2 mm, OD:15 mm), 20PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.
Square O-Ring (ID:18 mm, CS:2 mm, OD:22 mm), 6PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces..