Nilfisk Aero 440 and Attix 3 Vacuum Cleaner Filter Element (11753) - Vacuum Spot
1pcs Cartridge vacuum HEPA Filter Compatible with Nilfisk-ALTO WAP AERO 400,440,600,640,840,800A Wet/Dry Vacuum Cleaner parts - AliExpress
1 x filter suitable for Alto/Nilfisk Aero 400/440 / 600/640 / 800-A / 840-A/absolute filter : Amazon.de: Home & Kitchen
Cartridge Filter Wet and Dry for Nilfisk Vacuum Cleaner AERO 21-21 PC, AERO 21-21 PC INOX Alternative to Original 107402338 by Microsafe : Amazon.co.uk: Home & Kitchen
1pcs Cartridge vacuum HEPA Filter Compatible with Nilfisk-ALTO WAP AERO 400,440,600,640,840,800A Wet/Dry Vacuum Cleaner parts - AliExpress