R-236 Square O-Ring (ID: 3 1/4", CS 1/8", OD 3 1/2") by ContractorsX
ContractorsX Square O-Rings are used to block a path which may otherwise allow a liquid or a gas to escape. The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.
Features:
1) Helps to eliminate leaks in many applications, such as faucet drips at the spout
2) Nitrile rubber construction
3) Tough, flexible rubber construction
4) Dimension in SAE: ID: 3.234", CS: 0.139", OD: 3.512")