Environmental zinc interlocking balance wheel: 1,Material:Hardened metals 2,Processing :stamping,broaching 3 ... riveting, grindingSurface treatment:Hot galvanized, polishing, chrome/zinc/nickel plating, PVC coating, anodize, E-coatingApplicable industry:Automotive IndustryElectrical IndustryBuilding IndustryFurniture IndustryMachine ... IGS, STP, STL and X-T) Environmental zinc interlocking balance wheel