... ratio Compact structure,reliable&quiet performance Good Gear motor encoder 20mm 2500g.cm ZYM-20A()-195-0640 ... 38mm,40mm,42mm,46mm,48mm,65mm Planetary gear motor we have: 16mm,22mm,28mm,36mm,45mmSpecifications ... Current: 80mA(Max 160mA)No-load Speed 39 rpm±12% Rated Current: 330mA(Max480mA)Rated Speed ... information please contactour sales engineer. Good Gear motor encoder 20mm 2500g.cm ZYM-20A()-195-0640 ...