2 Pack Vacuum Filter Fits For Nilfisk/alto/aero 21,25,26,31 Flex Vc (e) 21-26l Protool Vcp10e Attix Multi Vacuum Cleaner Parts - Vacuum Cleaner Parts - AliExpress
Nilfisk ALTO Aero 25 - Easy Fix when the bag keeps coming off - YouTube
8 Bags for NILFISK Alto Aero 25-21 26-21 Vacuum Cleaner Filters High Filtration 5053197118039 | eBay
Cartridge Filter Wet and Dry for Nilfisk Vacuum Cleaner Aero 20-25, 26-35, 400, 440, 640, 840 Alternative to Original 107402338 by Microsafe : Amazon.co.uk: Home & Kitchen