Feature:1. High-torque and high-efficiency.2. Removable/Replaceable rotor.3. High RPM ABEC5 oversized bearings.4. High purity copper windings maximizes efficiency.5. CNC machined 6061 T6 billet aluminum heatsink can.6. Precision engineered for maximum energy conversion.7. Precision balanced rotor,smoothness for best reliability and maximum RPM.8. Universal fit, fits all 1/10 brushless cars-multi-mounting system for M3 screws.9. High-torque and high-efficiency.Removable/Replaceable rotor.High RPM ABEC5 oversized bearings.Specification:The GoolRC S3650 3100KV 4 Poles sensorless brushless motor is designed to provide both quality and performance at an affordable price. It is built from high quality aluminum alloy which is produced from the latest CNC milling machines, and is designed with high power and rotation speed to provide longer run time.Features:High-torque and high-efficiency.Removable/Replaceable rotor.High RPM ABEC5 oversized bearings.High purity copper windings maximizes efficiency.CNC machined 6061 T6 billet aluminum heatsink can.Precision engineered for maximum energy conversion.Precision balanced rotor,smoothness for best reliability and maximum RPM.Universal fit, fits all 1/10 brushless cars-multi-mounting system for M3 screws.Specifications:Brand name: GoolRCItem No.: S3650KV(RPM/Volt): 3100KVMax RPM: 50000Watt: 900WMax current: 56AMax voltage: <16VRessistance: 0.0126Diameter: 36mmLength: 50mmShaft length: 15mmShaft diameter: 3.175mmWeight: 176gConnector: 4mm golden banana connectorPackage Information:Package size: 10.3 * 8.1 * 6.2cm / 4.1 * 3.2 * 2.4inPackage weight: 211g / 7.4ozBrand gift box packagePackage List:1 * GoolRC S3650 3100KV Brushless Sensorless MotorPackage List:1 * GoolRC S3650 3100KV Brushless Sensorless Motor