... your own needs like voltage, speed, torque front shaft length and so on. Model No.Main Performance ... motorDimension: dia. 24.4 x 30.8 L. shaft O.D. 2.0 mmBasic Structure: SECD housing / ... protectionBuilt-in AC/DC rectifierBuilt-in cooling fanMultiple output shaft diamond knurls, straight knurls, D-cut, stepped shaftShaft ... with low noise motor,low rmp motor,used for copy machine and hair dryer motor