Features 1、CNC machined aluminum heatsink shell is of good heat dissipation. 2、High purity copper windings maximize conductivity and lower energy consumption. 3、Rotor is removable and replaceable. 4、Powerful sintered neodymium magnet. 5、Precision design for maximum energy conversion. Specification Description: This 540 brushless motor is made from the best materials available, and is designed to provide both quality and performance. Adopting high quality aluminum alloy parts, the 540 13.5T brushless will provide more power and longer run times with its high efficiency. Features: CNC machined aluminum heatsink shell is of good heat dissipation. High purity copper windings maximize conductivity and lower energy consumption. Bonding pad is high-power, soldering point is smooth and won't interfere with the use of electronic components. Rotor is removable and replaceable. Powerful sintered neodymium magnet. Precision design for maximum energy conversion. Adjustable timing. Compatible with any sensored or sensorless ESC. Compliance of IFMAR, ROAR. Specification: Material: Metal + Magnet Color: Blue Max Current: 108A / 49A Watts: 490W / 190W Motor Model: 540 Sensored: Yes Motor Diameter: Approx. 36mm / 1.41inch Motor Length: Approx. 50mm / 1.97inch Shaft Diameter: Approx. 3.175mm / 0.125inch Shaft Length: Approx. 13mm / 0.51inch Weight: 204g Type: RC Part Package Includes: 1 x Motor 1 x Cable Package List