the best material of cylinder head gasket and eahaust gaskets.It is used to cut gasket for seal of various flanges It is formed by flexible graphite foil mechanically clinched to (0.20mm~0.25mm) thick carbon steel tanged (perforated) metal sheet -08F tinplate insert. It is the best gasket material for cylinder head gasket and exhaust gasket. And it is used to cut gasket for seal of various flangesProduct Date Sheet Density: 1.30~1.50g/cm3 Appled Temp: -200 ~ 2500 Deg.C ( In Non Oxidizing Atmosphere) Threshold Temp.For Oxidation: 500 Deg.C ( a temp at which weight reduced 1% during 24 hrs in air) Tensile Strength: > 70 kgf/cm2 Compressive Strength: > 800 kgf/cm2 Carbon Content: > 98% Ash Content: < 1.0% Compressibility: >15% Recovery: >35% Standard Sheet Size: 400mm x 1000mm 500mm x 1000mm 800mm x 1000mm 1000mm x 1000mm Thickness: 1.0mm ~ 3.0mm The other size is optional or according to the requirements of customers