Compatible with: Nilfisk Multi 20, Multi 30, Aero 20, Aero 21, Aero 25, Aero 26, Aero 31, Attix 30, Attix 40, Attix 50, Attix 751, Attix 791, Alto WAP 25-11, Alto WAP 25-21, Alto WAP SQ-450-11, Alto WAP SQ 451-21, Attix 350-01, Attix 360-11, Attix 360-21, Attix 360-2M, Attix 550-01, Attix 550-21, Attix 550-2M, Attix 751-11, Attix 751-21, Attix 791-21, Attix 751-2M, Attix 30-01, Attix 30-11 PC, Attix 30-21 PC, Attix 40-01 PC, Attix 40-21 PC, Attix 50-01 PC, Attix 50-21 PC. Replaces part numbers: 107402338.