... 6Ra3.2~6.3Stainless Steel, Heat resistant Steel,Carbon Steel,Aluminium Alloy and other materialCompound Shell Precision ... 3~12.5Stainless Steel, Al Alloy,carbon steel, Ally Steel, Copper AlloyWater Glass Precision CastingCT8~9Ra12.5~25Carbon steel, ... customers. ServiceOEM/ODM are welcomeMaterialStainless Steel, Heat resistant Steel,Carbon Steel,Aluminium Alloy,Alloy Steel, Copper Alloy , Ductile ...