This is a Factory Sealed. 4 Pole 6S Motor (Item #AR390205). The BLX 2050kV brushless motor provides speed and torque and is perfectly balanced for use with the BLX185 ESC unit. A beautifully etched black aluminum motor can provides a premium look, whilst a 4 pole internal configuration keeps the power supply smooth and consistent. Gold bullet connectors provide fast and easy wire removal when you need to clean down your vehicle. The aluminum motor can provides increased heat dissipation from the finned body section. A dual motor shaft flat section provides a safe and secure pinion gear fitting. 0.196 (5 mm). However, we may not be able to identify all defects. The difference often varies 24 hours or more. Please order with care. Once an order has been processed it cannot be canceled.