AIR FILTER Compatible Vacuum Cleaner ALTO Models: Attix 30-01 PC, Attix 30-2M PC, Attix 30-11 PC, Attix 30-21 PC, Attix 350-01, Attix 360-11, Attix 360-21, Attix 550-01 MEASUREMENTS: Outer diameter 185 mm , Inner diameter 145 mm , H 140 mm Reference Code (RAT.): 21-801 Original Code: 42160 HIGH