Cooling fan overview: the protek rc 40x40x10mm aluminum high-speed hv cooling fan is designed to maximize motor performance by keeping temperatures low and extending motor life. Ideal for high-performance rc applications, this fan ensures consistent power output during long runs, helping you stay ahead on the track. Crafted with a durable cnc-machined aluminum casing and lightweight plastic fan blades, this high-rpm cooling fan delivers exceptional heat dissipation. Capable of handling direct two-cell lipo voltage, it is versatile and easy to install on a wide range of platforms, making it a must-have for competitive racers. Features: durable cnc-machined aluminum casing for added protection efficient heat dissipation for cooler motor operation high rpm capability high-voltage capable designed for high-performance applications lightweight plastic fan blades for efficient airflow compact 40mm size durable construction for reliable performance pre-wired with two-pin connector significantly increases airflow specifications: applications: 1/10 and 1/8 scale operating voltage: 5. 0-8. 4v size (lxwxh): 40x40x10mm connector: jst 2-pin includes: (1) protek rc 40x40x10mm aluminum high-speed hv cooling fan (ptk-2115)