Features:1) PWU125-16-F, PWU225-27.5-II, PWU280-31.5-II plane double envelope circular screw decelerator is an accessory equipment for construction machines or cranes or hoists to buffer, adjust and reduce the speed2) Conforms to the requirements of GB/T16445-96 7j3) Drive efficiency: 85%4) Drive ratio: 16-27.5-31.5Packing: wooden case producing area:China payment:L/C, T/T supplying capacity:50 sets/month