Vacuum Bag, For Vacuum Type Upright Vacuum, Fits Vacuum Brand Nilfisk, Fits Vacuum Models Aero 20, 21, 25, 26, 30, 31, Bag Filtration Type Standard, Filter Efficiency 1.0 micron, Bag Material Fleece, Ply Count 1-Ply, Bag Pickup Type Wet/Dry, Bag...