Perfectly compatible: the cylindrical filters is suitable for WD3, WD2, WD1, MV3, MV2, K, KNT, .For compact battery WD1, WD2, WD2 Plus, WD2 Premium, WD3P, WD3, WD3 battery, WD3 Premium, 2,200 at 2.250, 2,400 m, 2,500m, 3.200 at 3.800m, MV2 MV2, 3.MV3P, A2004, A2054 Me, A2101, A2120, A2204, A2254, A2604, A2654, K2150, K2301, K2901, K4000, KNT2 Premium, replace the filter; : 6.414.-547.0, 6.414-772.0, 6.414-552.0 Filtering Elements in high quality material: Piece Detachee vacuum cleaner of high -quality HEPA filter paper and a blown fabric; Metal condition are used, and the product is made of high density ABS material according to size;.The dense fabric blown with Land; Mademis state and the HEPA filter paper with active charcoal eliminate odors, purify Land; Air and absorb harmful substances.Due to the good permeability to Land; Air, the engine not overheat. High efficiency filter: filter made from high -resistance materials, respectful of land; environment and efficient. The filter