Castings and forgings Zhengzhou sinco can supply die castings in a wide range, it include, aluminum die casting( high pressure part, it can take more than 30 kgs pressure), zinc alloy die casting etc, the small part we had made is about 0.05 kgs, the bigger part we had made is about 5 kgs. Zhengzhou sinco offer all kind of forged hubs and sleeves, the material can be carton steel and alloy steel, the od ranged from several ten milometers to about 800 milometers. Normal packing