... :35,1:63, 1:86, 1:115,1:150,1:250,1:360Specification MODELReduction RatioVOLTAGENO LOADAT MAXIMUM EFFICIENCYSTALLSPEEDCURTRENTSPEEDCURRENTTORQUEOUTPUTTORQUECURRENTVr/minAr/minAKg.cmWKg ... , Please call to 86-574-27950958 6v and 12v 1:250 ratio 50rpm high torque powerful small metal gear motor