Feature: 1. Water Cooling: This RC boat brushless motor adopts dual heat dissipation system, air cooling fans at motor rear. Also equipped with water cooling. 2. Balanced Rotor: This RC boat brushless motor with precise and balanced rotor provides high reliability and maximum RPM smoothness. 3. Precise Design: This RC boat brushless motor adopts precise design, which can realize the maximum energy conversion. 4. High Efficiency: This RC boat brushless motor ensures high efficiency in operation, providing low noise and low power consumption. 5. Premium Material: This RC boat brushless motor is made from premium aluminium alloy and copper, which is sturdy and durable. Specification: Item Type: RC Boat Brushless Motor Material: Aluminium Alloy and Copper Color: Blue KV Value: 1500KV Applicable Voltage: 2-6S (7-22V) Maximum Current: 30A Maximum Power: 600W Motor Diameter: Approx. 28mm / 1.1in (Excluding Cables and Nozzles) Motor Height: Approx. 62mm / 2.44in (Without Shaft) Shaft Diameter: Approx. 3.17mm / 0.12in Cooling Method: Air Cooled and Water Cooled, the Tail of the Motor is Equipped with a Fan, and There is a Water Cooling System. Water Nozzle: Approx. 4mm / 0.16in (Suitable for 3 x 5 Silicone Tube) Plug: Approx. 3.5mm / 0.14in Banana Head Male Application: RC Remote Control Boat. Package List: 1 x RC Boat Brushless Motor Note: This motor is suitable for the length of 450mm to 550mm RC electric boat, using voltage 2‑6s lithium (not included).