The Horton Engine Cooling Fan Clutch Fan Clutch is the perfect solution for high heat under hood applications. With a back pulley diameter of 8.59" and a front pulley diameter of 0.00", this fan clutch is designed to provide superior performance and reliability. This fan clutch is compatible with Freightliner and Sterling trucks, making it a versatile and reliable choice for a wide range of applications. With high torque capabilities, this fan clutch is capable of turning larger fans, making it the perfect solution for high heat under hood applications. The on and off operation reduces noise and conserves fuel, making it an efficient and cost-effective choice for any vehicle. Overall, the Engine Cooling Fan Clutch Fan Clutch is a superior solution for any high heat under hood application. FleetPride is your First Click in Heavy Duty®.