Genuine James Gaskets uses state of the art materials and production methods to make the best gaskets available. Comprehensive gasket kits for many applications as well as individual gaskets are available. Various material choices available depending on application. FOAMET - foam covered metal. MLS - multi layered steel. RCM - rubber covered metal. Micropore paper gaskets with or without elastomer bead (Nitrile or Silicone). Made in the u. s. a.