... ratio Compact structure,reliable&quiet performance Good Gear motor encoder 20mm 2500g.cm ZYM-20A()-195-0640 for print lock ... 35mm,36mm,37mm,38mm,40mm,42mm,46mm,48mm,65mm Planetary gear motor we have: 16mm,22mm,28mm,36mm,45mmSpecifications Rated Voltage: 6 ... , motorized tools, for more information please contactour sales engineer. Good Gear motor encoder 20mm 2500g.cm ZYM-20A()-195-0640 for print lock