Bissell vacuum filter. 7, 8, and 14. Filtrete vacuum filters help capture dust mites, grass, and ragweed pollen. Fits models: Bissell CleanView (3575, 3590, 8975, and 8990 series), CleanView Power Trak (3591, 3593, 3594, and 6590 series), CleanView Revolution (3595 and 3596 series), Lift-Off (3750, 6595, and 6801 series), Lift-Off Revolution (3760, 6850, and 6860 series), Pet hair Eraser (3920 series), Power Trak Revolution (6591 series), Total Floors Velocity (3990 and 6393 series), and Velocity (3950 series).