The Yokomo RPX4 ESC Cooling Fan is a high-RPM brushless cooling fan designed to keep your electronic speed control running at a safe operating temperature during demanding sessions. It connects via a standard two-pin JST-style connector, making installation straightforward on a wide range of 1:10 electric platforms. This is the Yokomo factory replacement fan for builds using the RPX4 ESC. Features: High-RPM rated cooling fan Two-pin JST-style connector for easy installation Designed for use with the Yokomo RPX4 ESC Compact square frame fits common ESC mounting footprints 7/7/26 cs