... 10years experience in gearbox area. Developing time:45Days Low RPM DC Gear MotorHOUSING Material: Zinc Alloy Reduction ratio: i:24,i ... :43,i:72,i:86,i:120,i:200,i:450,i:500 ,i:750,i:900,i:1350voltage ... , robot arms, automatic door locks, electric toothbrushes, etc.; Low RPM DC Gear Motor