RV Trailer Culligan Repl O-Ring Or-233 Fresh Water Filter Housing O-Rings Pack of 2 by CFS Fresh Water Filter Housing O-Ring; Replacement For Culligan Models US-550/ US-560/ SY-5167/ SY-5197; 3/8 Inch Thickness Slimline; Single This is a compatible after market o ring.

• RV Trailer Culligan Repl O-Ring Or-233 Fresh Water Filter Housing O-Rings Pack of 2 by CFS
• Fresh Water Filter Housing O-Ring; Replacement For Culligan Models US-550/ US-560/ SY-5167/ SY-5197; 3/8 Inch Thickness Slimline; Single

RV Trailer Culligan Repl O-Ring Or-233 Fresh Water Filter Housing O-Rings Pack of 2 by CFSComplete Filtration Services