Carbon brush dc motor Diameter 35.5mm,Length 50mm,Shaft 3.175mm Voltage: 3. ... 2000~25000r.p.m Output:5~75W DC motors models RS-540 or RS-545, Carbon brush dc motor, Cylinder, Diameter35.5 mm, length 50 ... ~45.040.09,2500.128,0650.6420016.5664.71,561 DC Motor RS-540 & RS-545