... treatment reach 50degree 3.Smooth surface 4.Long life time chrome plating sprocket kits we can custom all kinds of type wheel ... steel and 16MnSurface-finishingSandblasting, Dull polish, Galvanized, with the circle line in the surface or according to your requirement.Heat treatment ... - East, Asia, South East Asia, South Amercia, American, Europe, Worldwide chrome plating sprocket kits