Rated Voltage: 13.5 VDC 3/8" shaft with 1 flat ("D" shaft) where flat to OD is 0.322" and the length of the shaft is 0.886" long Speed: 50 RPM Mounting: M6 screw holes Rated Torque: 6 N-m (4.4 ft-lb) Imported from Japan or USA. It takes about 2 to 3 weeks to arrive.