... .Highly Standard Modular Designed 2.High Strength,Compact Dimension Plastic reducer/gear motor with high quality/(PVC, PP, PE, PA, PC ... strength cast iron. Gears and shaft gears are finished with gas carburizing process and precise grounding to sequentially get high loading ... and request,pls don't hesitate to contact me. Plastic reducer/gear motor with high quality/(PVC, PP, PE, PA, PC ...