The Kärcher KFI 3310 is a specialized cartridge filter designed to allow you to switch between vacuuming wet spills and dry debris without needing to stop and change filters. This versatility makes it a practical choice for those using the WD 1, WD 2, or WD 3 series, as well as MV 2, MV 3, and SE 4001/4002 models. Measuring 122 x 122 x 115 mm and featuring a distinct brown and orange color scheme, the filter is built to handle everything from fine dust to coarse dirt and liquids. It installs quickly via a twist-lock mechanism, which secures the component firmly in place without requiring any additional locking tools or elements.