Cartridge Filter, For Vacuum Type Shop Vacuum, Fits Vacuum Brand Nilfisk, Fits Vacuum Models AERO 21, AERO 21 INOX, AERO 26, AERO 31 INOX, ATEX - TYPE 22, ATTIX 30, ATTIX 30/40/50, ATTIX 30/40/50 - M-CLASS, ATTIX 40 INOX, ATTIX 5/7 ATEX - TYPE 22,...