Westwood F25 High Efficiency Top Fuel Heating Oil Filter with Extra F15-48 Replacement Felt Element and Gaskets Bundle comes with one filter element in the housing PLUS one replacement with new gaskets as shown! Hardened grade 5 center bolt and durable cast iron top and internal epoxy coating. Standard 3/8" NPT pipe tappings and fully machined gasket surfaces and UL listed gasket materials. Steel plated canister exterior and hardened grade 8 bottom bolt. UL Approved Ratings: 17GPH, 52PSI, No. 2 Oil or lighter. B5 Biofuels Compatible!