Please view below data of motor TE16KM-12-576: Voltage:12V Ratio: 1: 576 rated speed:18rpm rated torque2.8kg/cm Allowable torque: 4.0 diameter:16MM TE16km-12-576 ink key motor(Copying) is our main product. It can replace Ryobi 920 original ink key motor. Long work lift, Low noise, high quality and low price caused its selling keep growing up.At present we have 200-300 units in stock.