(8 PACK)Replacement 151120 O-Rings (also called gaskets or seals) for Pentek Water Filters Direct replacement for Part Numbers:Hydrotech 151120,American Plumber 152030, W34-OR, Ace Hardware 46766, Ametek Kleen-Plus 151120-03, OR-34,, Everpure EV3112-40, Pentek 151120 Culligan 01019184, 151120-27, DuPont WFAO150, Omnifilter 151120, OR-34, Pura 151120, US Filter OR-34 Compatible with: Pentek/Pentair 3G Standard Series, Ace Hardware 45025, 46764, 46764,Traditional Standard Series, and Valve-In-Head VIH Series; American Plumber W34-PR, WC34-PR, WV34, WVC34; Ametek Kleen-Plus PSCL-SI / PSCL-S1, PS-OO / PS-00, PVHCL-SI / PVHCL-S1; Omnifilter WH1 / WH5 / WH12 / OB1 (Series A) / U25 (Series E) Culligan HF-150, HF-150A, HF-160, HF-360; , No grease required. Simply wet the o-rings with water then install. Compatible with silicone and petroleum based greases if desired. Approximately 3.9" ID x4.15" OD x 0.14" Thickness Alternate Part Numbers: Ace Hardware 46766, American Plumber 152030, W34-OR, Ametek Kleen-Plus 151120-03, OR-34, Culligan 01019184, 151120-27, DuPont WFAO150, Everpure EV3112-40, Hydrotech 151120, Pentek 151120, Omnifilter 151120, OR-34, Pura 151120, US Filter OR-34 Filter Housing Compatibility: Pentek/Pentair 3G Standard Series, Traditional Standard Series, and Valve-In-Head VIH Series (see description for housing model numbers); Culligan HF-150, HF-150A, HF-160, HF-360; Ace Hardware 45025, 46764, 46764; American Plumber W34-PR, WC34-PR, WV34, WVC34; Ametek Kleen-Plus PSCL-SI / PSCL-S1, PS-OO / PS-00, PVHCL-SI / PVHCL-S1; Omnifilter WH1 / WH5 / WH12 / OB1 (Series A) / U25 (Series E)