Robot Recommended motor models are ET-SGM12C、ET-SGM30A、ET-SGM37D、ET-SGM37D2、ET-SGM37F、ET-PGM16. Education Robot Recommended motor models are ET-SGM12C、ET-SGM30A、ET-SGM37D、ET-PGM16、ET-WGM34、ET-WGM46. Robotics Arm Recommended motor models are ET-SGM12C、ET-SGM30A、ET-SGM37D、ET-SGM37D2、ET-SGM37F、ET-PGM16. Robot Arm Recommended motor models are ET-SGM12C、ET-SGM30A、ET-SGM37D、ET-SGM37D2、ET-SGM37F、ET-PGM16. DIY Robot Recommended motor models are ET-SGM12C、ET-SGM30A、ET-SGM37D、ET-SGM37D2、ET-SGM37F、ET-PGM16. Heavy Duty Robot Arm Recommended motor models are ET-PGM36.