Product Information: Description: GOT - 420 Corrugated Metal Gasket is processed by metal flat ring into concentric waveform coil by die-pressing, rolling, or turning techniques, with the surface sticking non-metal as expanded graphite or PTFE. Comparing with 410 Kammprofile gasket , the lining metal can choose multiple thickness, as 3mm, 2mm, 1mm, 0.5mm, etc. and the metal wave distance can be different according to the width difference of the sealing surface, generally be 3mm, 4mm, 6mm Selectable material: Metal material German trademark Hardness HB Temperature íµ Density g/cm3 Thickness mm Carbon Steel 1.1003/1.0038 90~120 -60~500 7.85 0.5mm; 1mm, 2mm; 3mm, 4mm SS304, SS304L 1.4301/1.4306 130~180 -250~550 7.9 SS316, SS316L 1.4401/1.4404 130~180 -250~550 7.9 Other metal on require Overlaying material: Flexible graphite, PTFE, asbestos plate, non-asbestos plate; Generally the thickness of the dual overlaying is 0.5 mm, 1.0mm, 1 .5mm