Cartridge Filter, For Vacuum Type Shop Vacuum, Fits Vacuum Brand Nilfisk, Fits Vacuum Models AERO 21 / AERO 21 INOX, AERO 26, AERO 31 INOX, ATTIX 30, ATTIX 40 INOX, ATTIX 50, ATTIX 7, VL200, Filter Pickup Type Dry, Filtration Type HEPA, Filter...