... specializing in various castings (cast iron) of pulleys & sheaves as per customers' drawings & samples. FEATURES TO Cast Iron,CASTINGS OF PULLEYS & SHEAVES ... . 1.Material & Standard:grey iron(GG20,GG25,GG30),ductile iron(GGG40,GGG50);JIS,DIN ... casing,cover,valve body,pump body,big ring gear,bolster,frame,rear frame,front frame,engine block.