Durabelt Vacuum Belt, Hoover Nanolite: * Maintain optimum performance by replacing your belt every 12 months * For use in Bissell PowerForce (3522, 3525, 71Y7 Series), Lift-Off (3554 Series), Plus (3550, 3553 Series), PowerGlide (3545 Series) and PowerTrak (6592 Series) Uprights