1.We are a gold member from alibaba . 2.Our company is in shijiazhuang , near beijing . There are nine main product series : 1)series of semitrailer axle suspension . 2)series of axle welding suspension . 3)series of axle welding for semitrailers . 4)series of sheave for semitrailers . 5)series of dumptor fittings . 6)series of lock fittings for containers . 7)series of railway fittings . 8)series of engineering and machinery fittings . 9)series of air suspension . 3.The investment casting products are mainly made from 1)cast steel . 2)cast iron . 3)carbon steel .[carbon steel , low-carbon steel , medium-carbon steel , high-carbon steel , general-carbon steel , high-quality carbon steel] 4)alloy steel . [low-alloy steel , medium-alloy steel , high-alloy steel] 4.Special request is available . Once you send us the drawing & detail technical data , we would check if we could produce for you asap. Normal in wooden case : 110mm*100mm*100mm