... with high quality 1.Highly Standard Modular Designed 2.High Strength,Compact Dimension Plastic reducer/gear motor with high quality/(PVC, PP, PE, PA, PC, ABS .etc)Series ... are made of high strength cast iron. Gears and shaft gears are finished with gas carburizing process ... me. Plastic reducer/gear motor with high quality/(PVC, PP, PE, PA, PC, ABS .etc)Series general helical gear box