Kärcher - 4 Pack Fleece Filter Bags - For Wet Dry Vacuums - Replacement Part - For Kärcher WD4, WD5, WD5/P, WD6 - - Amazon.com
Amazon.com - WSYBH Replacement of Filter Bags Parts Fit for Karcher MV4 MV5 MV6 WD4 WD5 WD6 Fit for Karcher WD4000 to WD5999 Part#2.863-006.0 Part (Color : 12PCS) -
Amazon.com : Hippotech Air Filter for Karcher WD4.200 WD5.200 WD4 WD5 6.414-960 WD5.400 WD5.500M Vacuums : Patio, Lawn & Garden
Amazon.com: Karcher WD 4 Multi-Purpose 5.3 Gallon Wet-Dry Vacuum Cleaner with Attachments : Home & Kitchen