R-122 Square O-Ring (ID: 1 1/8", CS 3/32", OD 1 5/16"), 6PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces..
.R-216 Square O-Ring (ID: 1 1/8", CS 1/8", OD 1 3/8"), 20PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.