R-160 Square O-Ring (ID: 5 1/4", CS 3/32", OD 5 7/16"), 48PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces..
R-152 Square O-Ring (ID: 3 1/4", CS 3/32", OD 3 7/16"), 120PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces..
.R-040 Square O-Ring (ID: 2 7/8", CS 1/16", OD 3"), 60PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.