Cometic's proprietary AFM (Aluminum Foamette Material) gaskets feature an aluminum core with a chemically blown, compounded nitrile synthetic rubber bonded to the outside, Gaskets have resistance to temperatures of more than 205ﾰ F, Have an 85% shape-recovering while maintaining strong torque retention - ideal gasket material for machined surfaces, Does not require gasket sealer, Kit includes all gaskets, seals and O-rings required for both the inner and outer primary, Made in the USA