Features: High - purity copper windings, ensuring maximize efficiency. Fast speed super large bearing, designed for 1/10 RC car boat. Precisely balanced rotor, having stable and excellent performance. Helping to better control your remote control car or boat model. Exquisite workmanship, meeting your precise motion control needs. Specifications: Condition: 100% Brand New Material: Metal magnet Voltage (Max support): 12 V Battery: 7.2-7.4v Size: Approx. 36x50mm / 1.42x1.97 inches (diameter x length) Shaft length: 10mm / 0.39 in Shaft diameter: 3.175mm / 0.125 in Cable length: 108mm / 4.25in Optional Type: 23T, 35T, 45T, 55T, 60T 23T: Voltage: 7.2 -12 V Suitable for 1/10 car model and ship model Outside diameter: 50*36mm Axle diameter: 3.175mm Axle length: 10mm RPM: 18300 D shaft 35T: Voltage (Max support): 12 V Suitable for 1/10 car model and ship model Outside diameter: 50*36mm Axle diameter: 3.175mm Axle length: 10mm RPM: 12000 D shaft Battery: recommended 7.2-7.4V battery 45T: Voltage (Max support): 12 V Suitable for 1/10 car model and ship model Outside diameter: 50*36mm Axle diameter: 3.175mm Axle length: 10mm RPM: 10000 D shaft Battery: recommended 7.2-7.4V battery 55T: Voltage (Max support): 12 V Suitable for 1/10 car model and ship model Outside diameter: 50*36mm Axle diameter: 3.175mm Axle length: 10mm RPM: 8000 ±10%rpm (Test after 1 minute operation) D shaft Battery: recommended 7.2-7.4V battery 60T: Voltage (Max support): 12 V Suitable for 1/10 car model and ship model Outside diameter: 50*36mm Axle diameter: 3.175mm Axle length: 10mm RPM: 6800 ±10%rpm (Test after 1 minute operation) D shaft Battery: recommended 7.2-7.4V battery Package List: 1 x 540 Motor 2 x Cable Motor Wire .