The original GoolRC 4092 1250KV 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 for 1000mm (or above) RC boat.<br><br><br>Features:<br>4 Pole 12 slot hi-torque motor design       <br>CNC machined 6061 T6 billet aluminum heatsink can       <br>High purity copper windings maximizes efficiency       <br>High RPM ABEC5 oversized bearings       <br>Precision balanced rotor, smoothness for best reliability and maximum RPM       <br>Stator-super thin (0.2mm) laminations       <br>Removable/replaceable rotor       <br>Precision engineered for maximum energy conversion<br><br>Specifications:<br>Brand name: GoolRC<br>Item No.: 4092<br>KV(RPM/Volt): 1250KV<br>RPM: 50000<br>Watt: 4200W<br>No load current: 2.6A<br>Max voltage: 37V<br>Diameter: 40mm<br>Length: 92mm<br>Shaft diameter: 5mm<br>Connector: 4mm golden banana connector<br>Weight: 447g<br><br>Package Information:<br>Package size: 10.3 * 8.1 * 6.2cm / 4.1 * 3.2 * 2.4in<br>Package weight: 479g / 16.9oz<br>Gift box package<br><br>Package List:<br>1 * GoolRC 4092 1250KV Motor