The copper water cooling ring is a vital component for maintaining the health of your RC boat motor. Its efficient design allows for continuous water circulation, effectively dissipating heat and preventing damage from overheating. ideal for high-speed boats, this accessory ensures your motor runs smoothly and efficiently, even during intense use. Features -Color:Light Brown -Material:Copper -Size:6.00X4.50X2.50cm/2.36X1.77X0.98in -Highperformance cooling: the pure copper tubing of this water cooling sleeve provides excellent heat dissipation, keeping your motor cool and enhancing its performance -Powerful brushed motor: equipped with a robust brushed motor, this assembly delivers strong power, making it ideal for highspeed rc boat applications and ensuring an exciting experience -Stable water cooling system: the integrated water cooling circulation system maintains a consistent motor temperature, preventing overheating and ensuring reliable performance -ideal compatibility: designed to fit 540/550 model boat motors, this cooling ring offers precise compatibility, ensuring optimal cooling and seamless integration -Easy to install: featuring a straightforward installation process, this cooling sleeve can be quickly and easily mounted, allowing you to get your rc boat back on the water with minimal effort Package list: 1 x circulating water cooling ring