CHAIN wheel our own professional team will give ... according to customers' requests2) Main material: stainless steel, aluminum, bronze, nylon3) Main equipment: numerically controlled machine tool, ... :cnc machining parts for kartingMaterialsstainless steel,alloy steel,aluminum,copper. etcSurface treatmentgalcanizationanodizingsand blastingdull polishPHOSPHATIZINGPOM and otherspackingPoly bags ...