The Hoover 40201200 is a replacement V-belt for the brushroll on Hoover Power Drive upright vacuum cleaners. It is a wear item: heat and friction cause drive belts to stretch and lose grip over time, which shows up as a slow-spinning or stalled brushroll and reduced pickup. Replace it as part of routine maintenance to restore full brushroll speed. Confirm your Hoover model number against part 40201200 before ordering.