Compatible with: Flat pleated filters for Kärcher WD 4, WD 5, WD 6, MV 4, MV 5, MV 6 HIGH FILTRATION: The WD 4 vacuum filter provides powerful filtration for cleaning closets, carpets and stairs. Our flat pleated filters also filter fine dust and the smallest particles down to 40 µm (= 0.04 mm), such as dust, smoke particles, bacteria, viruses, pollen. , mites. PREMIUM QUALITY: Vacuum cleaner parts meet or exceed original quality, compatibility and longevity, and are rigorously tested. Made of highly durable and environmentally friendly materials. These vacuum cleaner parts are washable and reusable. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.