Kärcher KFI 357 Fleece Filter Bags have been additionally adapted for the Kärcher WD 3 P Wet & Dry Vacuum Cleaner, WD 2 Plus Wet & Dry Vacuum and the SE 4001 Spray Extraction Cleaner. They stand out on account of their extremely tear-resistant material, their optimum suction power and their high level of dust retention. Ideally suited to demanding applications, e.g. for the suction of coarse and moist dirt. Pack Quantity: 4. Karcher Kfi 357 Fleece Filter Bags (pack 4)