COMPATIBLE MODELS - The replacement filter is suitable for Karcher WD2, WD3P, WD3 Premium, WD 3200, WD 3230, WD 3500, SE 4001, SE 4002, MV 2, MV 3, MV3P, A 2676, A 2901, A2000, A 2054 ME, A 2101, A 2120, A 2204, A 2254, A 2604, A 2654, A 3100, A 4000, KNT 2 Premium, WD 2250, WD 2500, WD 3.200, WD 3.300, WD 3.500, WD 3.600, WD 3200 , K 2000, K 2150, K 2301, K 2901, K 4000, MV 3 , NT27/1, SE 4001, SE 4002, VC6000, - Replaces original filters: 6.414-547.0, 6.414-772.0, 6.414-552.0 VALUE PACK - 2x cartridge filters for Karcher WD3. We recommend that the filter can be used for 2 to 3 months, after which it should be replaced and cleaned. Frequent replacement or cleaning of the filter is helpful to extend the life of the vacuum cleaner WASHABLE AND REUSABLE - The premium wd3 filter is washable, the high-efficiency filter cartridge can be chemically cleaned. If you find it dirty, you can remove the filter and then wash and clean it to keep it clean and improve filtration (Let it dry