Compatible to Pentek Water 151121 (2 pack) Direct replacement for the following part numbers: Pentek 151121; American Plumber W38-OR , 152031; Ametek 151121; Campbell 10800-034; Culligan OR-38 Compatible with the following water filter models: Pentek #5 and #10 Slim Line Housings, Pentek 3/8" Inlet/Outlet Slim Line Housings with a 3.5" diameter housing sump, Pentek 3G Housings; Ace Hardware 45335, 45449, 48166, 49562, 4001699, 4158515; American Plumber WLCS-500, WRO-3167; Ametek Kleen-Plus / Pentek CSL-CIK, CCF-201, CTR-CMR-10, PSCL-C2, US-560, US-560K, SY-5167, SY-5197; Culligan RVF-10, US-316, US-550; US Filter RO-2127, RO-2300, RO-2300-A, RO-3167 Material: Buna-N (nitrile butadiene rubber) Additional Details ------------------------------ Bullet point: Compatible to Pentek Water 151121 (2 pack)|Direct replacement for the following part numbers: Pentek 151121; American Plumber W38-OR 152031; Ametek 151121; Campbell 10800-034; Culligan OR-38|Compatible with the following water filter models: Pentek #5 and #10 Slim Line Housings Pentek 3/8" Inlet/Outlet Slim Line Housings with a 3.5" diameter housing sump Pentek 3G Housings; Ace Hardware 45335 45449 48166 49562 4001699 4158515; American Plumber WLCS-500 WRO-3167; Ametek Kleen-Plus / Pentek CSL-CIK CCF-201 CTR-CMR-10 PSCL-C2 US-560 US-560K SY-5167 SY-5197; Culligan RVF-10 US-316 US-550; US Filter RO-2127 RO-2300 RO-2300-A RO-3167|Material: Buna-N (nitrile butadiene rubber)