Cometic's proprietary AFM (Aluminum Foamette Material) gaskets feature an aluminum core with a chemically blown, compounded nitrile synthetic rubber bonded to the outsideGaskets have resistance to temperatures of more than 205°FHave an 85% shape-recovering while maintaining strong torque retention - ideal gasket material for machined surfacesKit includes all gaskets, seals and O-rings required for both the inner and outer primaryMade in the USADoes not require gasket sealer.