... .Speed:10-50rpm 3.Ratio:1:1000 4.Specs as voltage,ratio can be customized 5.High Torque,Good price micro gear ... motor :Application inRobot,Automatic Door Lock, Toys,Camera,MonitorReduction Ratio 1:10,1:20,1:30, 1:50, 1 ... to contact with me if any more question. 6v 1:1000 ratio 5.5kg.cm high stall torque low rpm small dc ...