1、Enhanced Performance: High purity copper winding maximizes efficiency, having high strength magnet, low friction, low noise, external carbon brush can be replaced, can work for a long time. 2、Accurate Design: The brushed motor has accurate design for maximum energy conversion, precise rotor balance, smoothness increasing reliability and maximum speed. 3、Large Torsion: 540 brush motor has large torsion, compact circuit design, strong anti interference ability, two way bearing, strong magnetic force, small heat, large power. 4、Engine Protection: When the needed torsion exceeds the speed, the motor speed is reduced and the power distribution is sensitive, providing a smooth RC start and preventing the RC from shaking and stalling when starting. 5、Stable Operation:The RC brushed motor has easy installation and disassembly, with 1/5 deceleration wave box of ultra high performance, effectively protecting the gearbox motor body, increasing high torsion output. Item Type: 540 Brushed Motor Operating Voltage: 7.2-7.4V Length: Approx. 53mm/2.1in (Without Shaft) Diameter: Approx. 36mm/1.4in Shaft Length: Approx. 10.5mm/0.4in Axle Diameter: Approx. 3.175mm/0.125in 1/5 Deceleration Wave Box: Deceleration Ratio: 1:5 Diameter: Approx.36mm / 1.4in Total Length: Approx. 54mm/2.1in Axle Length: Approx. 11mm/0.4in Axle Diameter: Approx. 5mm/0.2in 15T Gear: Diameter: Approx. 8.3mm/0.3in Length: Approx. 10mm/0.4in Hole Diameter: Approx. 3.175mm/0.125inFitment: For 1/14 Tractor, For 1/10 RC Off Road Vehicle/Trial Bike DIY modification 1 x 540 Brushed Motor 1 x Deceleration Wave Box 1 x Gear 6 x Screw 4 x Nut 2 x Set Screw 3 x Mounting Accessory