gaskets Surface Treatment:Galvanized,Bright,Black-coated. Standard:Chinese,America,Germanic and Japanese Standard gasketsPad in ... ,Black-coated,Bright.Standard:Chinese,America,Germanic,Japanese StandardPeculiar Gaskets:Round and square gaskets and peculiar gaskets.We can produce them ... 22mm of thickness.We also can produce flexible gaskets,of which surface treatment the same with standard gasket ...