Package List: 1PCS NEMA34 9.5NM Stepper Motor 1PCS Ratio 5:1 RV040 Worm Gearbox 1PCS 18mm Single Output shaft NOTE: We even have tools ratio 7.5:1, 10:1, 15:1, 20:1, 25:1, 40:1, 50:1, 60:1, 80:1 for choosing. If you would like other speed ratio,Please go away message let we know. Thanks! Motor Specifications : Holding torque: 950Ncm/9.5N.m Type: hybrid Phase: 2 Current : 6A Certification: CCC,CE, ISO Step angle: 1.8degree Worm Gearbox Specifications : Worm wheel: Nodular forged iron and bronze Worm Gearbox shaft Dimensions: 18mm(6mm Key) Housing: aluminum with oven portray Color: silver Model:RV040 Speed Ratio Range: 5:1,7.5:1, 10:1, 15:1, 20:1, 25:1, 40:1, 50:1, 60:1, 80:1 Please depart message in regards to the tools ratio you need. Thanks!