540 Motor Gear Reducer Sensitive in power distribution.Provide smoothly vehicles starting. RC Car Metal Shaft Gear Motor Prevent car from shaking and stalling when starts. This planetary gear reducer is mainly used for caterpillars type reducer. motors when torques is needed more than speed. The RC gear reducer is made of high quality metal, strong and , high performance, completely meet your needs. 27mm/1.06inch, Diameter: 36mm/1.42inch, Output Shaft Diameter: 3.175mm/0.125inch, Output Shaft Length: 15mm/0.59inch This gear reducer is suitable for any equipment that uses 540 size motor. Electric Mini Speed Reducer Motor works well as long as there is enough space to accommodate the extra length(27mm/1.06inch). Length(Motorless Shaft): 27mm/1.06inch Diameter: 36mm/1.42inch Output Shaft Diameter: 3.175mm/0.125inch Output Shaft Length: 15mm/0.59inch Colour:As Shown Material:Metal Package Contents: 1 set x Mini planetary reduction motor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.