Features 1、High purity copper winding, durable sealed bearing, low friction, low noise, and long lasting time. 2、Important remote control car accessory, suitable for Axial, for Trx4, for Trx6 RC car model. 3、Precise balanced rotor, high smoothness, good stability and excellent performance, convenient remove and replace. 4、540 Motor with large torsion, bidirectional bearing with strong magnetic force, small heat, large power. 5、Excellent torsion and long life, direct welding wire guide, providing flexible welding options. Exquisite workmanship to meet your precise motion control needs. Item Type: Motor Material: Iron + Copper Color: Green Length: Approx. 50mm / 1.97in Diameter: Approx. 36mm / 1.42in Shaft Length: Approx. 12mm / 0.47in Axle Diameter: Approx. 3.175mm / 0.13in Operating Voltage: 7.2-7.4V Maximum Voltage: 12V Fitment: Fit for Axial Fit for Trx4 Fit for Trx6 Fit for Tamiya 1/14 Installation method: The red line is welded to the positive pole and the black line is welded to the negative pole. The motor is connected to the electric adjustment (excluding) and installed to the car after it is energized. Note: 1.You cannot simply push the pinion all the way to the motor shaft, because doing so will push the shaft slightly into the motor, and you will need a little extra shaft space to engage properly. 2.The thread on a pinion.Do not overtighten it. 3. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 4. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List 1 x 540 Brushed Motor 2 x Connection Cable