.R-233 Square O-Ring (ID: 2 7/8", CS 1/8", OD 3 1/8"), 20PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.
.Square O-Ring (ID:15 mm, CS:2 mm, OD:19 mm), 4PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.
R-338 Square O-Ring (ID: 3 1/8", CS 3/16", OD 3 1/2"), 120PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.
.R-030 Square O-Ring (ID: 1 5/8", CS 1/16", OD 1 3/4"), 240PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.