1High - purity copper windings maximize efficiency. 2Fast speed super large bearing, removable, replaceable carbon brush. 3Precisely balanced rotor, stability, excellent reliability and maximum speed. 4High strength magnet with unparalleled brush motor performance. 5Designed for remote control vehicles requiring precise motion control. Features: High - purity copper windings maximize efficiency. Fast speed super large bearing, removable, replaceable carbon brush. Precisely balanced rotor, stability, excellent reliability and maximum speed. High strength magnet with unparalleled brush motor performance. Designed for remote control vehicles requiring precise motion control. Excellent torque and long running time. Directly welded lugs for flexible welding options. Specifications: Condition: 100% New Material: Metal, magnet Optional Type: MT540-8T, MT540-14T, MT540-19T, MT540-21T 8T: Voltage of 7.2 V to 12 V Suitable for 1/10 car model and ship model Outside diameter: 50 * 36mm / 2 * 1.4in The diameter of axle: 3.175mm / 0.1in No load speed: 30000 Current: 3.8A Carbon brush motor can be replaced 14T: Voltage of 7.2 V to 12 V Suitable for 1/10 car model and ship model Outside diameter: 50 * 36mm / 2 * 1.4in The diameter of axle: 3.175mm / 0.1in No load speed: 24500 Current: 3.5A Carbon brush motor can be replaced 19T: Voltage of 7.2 V to 12 V Suitable for 1/10 car model and ship model Outside diameter: 50 * 36mm / 2 * 1.4in The diameter of axle: 3.175mm / 0.1in No load speed: 22000 Current: 3.3 A Carbon brush motor can be replaced 21T: Voltage of 7.2 V to 12 V Suitable for 1/10 car model and ship model Outside diameter: 50 * 36mm / 2 * 1.4in The diameter of axle: 3.175mm / 0.1in No load speed: 2000 Current: 3A Carbon brush motor can be replaced Package List: 1 * 540 Motor 2 * Cable Motor Wire