Includes (2) Brand NEW Sierra replacement water separating fuel filter for use with Mercury and Mercruiser engines. Sierra fuel water separators remove over 99.8% of emulsified water from your gasoline. Sierra's 21 micron canister filters feature an epoxy-coated steel canister that prevents corrosion inside the canister from reaching your fuel system. These durable filters are pressure and leak tested to ABYC and USCG standards. All filters flow at 90 GPH to feed even the hungriest motor. Sierra 21 micron filters are recommended to prevent damage to sensitive inboard and outboard fuel injection systems. Application: Used on Mercruiser and Mercury Engines 21 Micron Rating 4.35" in Length in Length 11/16-16 Thread pitch Sierra recommends replacing filters every 50 hours of operation, or at a minimum of once per year, preferably at winterization. Interchangeable with: Fram PS3808 GLM 24941 Mallory 9-37800 Mercruiser Stern Drive 35-52456 35-55501 35-57250 35-60494 35-604941 35-60494A5 35-802893Q 35-802893Q01 35-805269 35-8052691 35-806771 35-807172 Mercury Marine 35-604941 35-802893Q 35-8052691 35-807172 Moeller 33323-10 Valmar 52113 Wix 33225