Fits for All Self-Propelled Windtunnel Vacuums Fits for Hoover windtunnel upright self propelled drive vacuum belts 38528035 40201170,also fits for Hoover windtunnel flat power drive belt type 170 belt Made of high quality rubber,durable service,easy to install and maintain, low maintenance cost Recommended to replace the belt every 3 to 6 months to maintain the cleaning performance of the machine Include two 38528-035 power drive belts