.Square O-Ring (ID:20 mm, CS:3 mm, OD:26 mm), 60PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.
.R-430 Square O-Ring (ID: 5 1/8", CS 1/4", OD 5 5/8"), 4PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.
.R-268 Square O-Ring (ID: 8 1/2", CS 1/8", OD 8 3/4"), 20PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.