Nom Dia: 15A-50A Length: 250mm-5000mm Material of the fitting: malleable cast iron (tin -plated) Non-welding and joint for high corrosion resistance application. Note: 1 please use imported anti-corrosion seal provided by our company. 2 When piping try avoiding deformation of the pipe resulting from twisting and bending. First fix the end with the joint of tapered screw thread and then tightien the screw nut with a pipe twist.