Material：I. Investment material : steel (including alloy steel and stainless steel), aluminum and copper. II sand casting: steel (mild steel,structural steel and alloy steel), iron (grey iron and ductile cast iron) Weight: I. Investment material: 5g~50kg/ PCS; II sand casting: steel: 5kg~4t/PCS Products: kinds of irregularly shaped castings, such as machine parts, magnet and creeper treads, sheel, valves, gears,cover, pulley etc