Cylinder Head Gasket Material 1,Thickness:1~3mm 2,Color: Gray, Black, etc 3,many size is option. 4,Certificate:ISO:9001:2000 ... Cylinder Head Gasket Material1,Description:Manufactured from asbestos beater sheet ... insert. It is best gasket material for motorcycle and automobile cylinder head gasket. 2,Product Date Sheet Density: 1.30 ~ 1 ...