R-428 Square O-Ring (ID: 4 7/8", CS 1/4", OD 5 3/8"), 24PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces..
R-225 Square O-Ring (ID: 1 7/8", CS 1/8", OD 2 1/8"), 8PK 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), 240PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.