Weight: 311g KV: Can custom Number of stator slot: 12G 4P Sensored or sensorless: Sensorless Shaft Diameter of shaft: Φ5mm-Φ18mm Motor size: Diameter Φ39.8 / Length 64.8mm Stator diameter: Φ38mm Available for: 1/8th or 1/10th scale vehicles,rc boat. ?High Quality CNC aluminum case,ensure lightweight and optimized air flow. ?High RPM,precision ball bearing. ?Low Resistance, High Power,silver plated solder tabs. ?Hand-wound for maximum copper fill,High Purity copper windings ensure maximun conductivity. ?Precision-balanced rotor will boost the efficiency and power performance of the motor. ?Nickel-plated sintered neodymium rotor for maximum motor acceleration, braking power and performance in high-temperature conditions.