How to change a cartridge filter on a vacuum (Karcher) - YouTube
Amazon.com: HQRP Cartridge Filter for Karcher WD3 Rallye Dakar, WD3 Tough Vac, WD3.300 M Vacuum Cleaner WD 3 series Multi-purpose Wet & Dry Vac Vacuum Cleaner : Tools & Home Improvement
Air Dust Filters For Karcher Vacuum Cleaners Parts Cartridge Hepa Filter Wd2250 Wd3.200 Mv2 Mv3 Wd3 Karcher Filter Parts - Vacuum Cleaner Parts - AliExpress