Oil Filter engineered with premium grade materials that will excel in the extreme marine environment. Features a heavy-wall steel canister and epoxy coating for further corrosion protection, high-efficiency filter media that meets or exceeds the OE’s filtration. Meets or exceeds OEM specifications. Backed by Sierra’s industry leading warranty. New o-ring seal included. Thread Spec: 3/4″ x 16 or 19.1mm x 406.4mm NPT. Anti-Drain-Back Valve.