This Graphite Gasket sheet is Manufactured from flexible graphite foil mechanically clinched to a 0.004" (0.1 mm) thick stainless steel tanged (perforated) metal sheet - SUS304 insert. It has good compressibility and resilience, excellent sealing property for microscopic surface irgeularities and long working life. The dimensions of the standard sheets:Whatsapp:86 13566083951 Size: 1000X1000mm,1500X1500mm,1000X500mm Thickness: 1.0mm ~ 4.0mm