... 1.Highly Standard Modular Designed 2.High Strength,Compact Dimension Plastic reducer/gear motor with high quality/(PVC, PP, PE, PA ... many closely divided ratios and wide range of them. Very big final ratios can be obtained through combined unites to reach ... inquiry and request,pls don't hesitate to contact me. Plastic reducer/gear motor with high quality/(PVC, PP, PE, PA ...