Hoover Type Y HEPA Filter Bag, Set of 2 Model # 4010801Y was replaced with Model # AH10040 Set of 2 Type Y HEPA disposable filter bags Fits Hoover WindTunnel bagged uprights and the Tempo upright High-filtration microfiber with 3 layers of Filtrete HEPA media Removes 99.97% of all airborne particles as small as 0.3 microns in size Replace filter bag regularly to keep vacuum running at peak performance