GASKET MATERIAL KIT. Included in this kit are seven pieces of material for custom made gaskets.ÿÿEach piece measures approximately 6" x 6".ÿ Kit contains the following: ÿ Two Metal reinforced heat gasket material, app. .040". ÿ Two Heat resistant compressed nitril cellulose, app. .015". ÿ One Steel reinforced exhaust material, app. .045" -.050" . ÿ One Cork and rubber nitril based material, app. 1/16". ÿ One Treated paper gasoline and oil resistant, app. 1/32".