Perfect Compatibility: Suitable for Karcher WD1, WD2, WD 2 Premium, WD3P, WD3 Premium, WD 3200, WD 3230, WD 3500, SE 4001, SE 4002, MV 2, MV 3, MV3P, A 2004, A 2054 ME. A 2101, A 2120, A 2204, A 2254, A 2604, A 2654, K 2150, KNT 2 Premium High-quality materials: Using high-quality HEPA filter paper and melt-blown cloth, the product is made of high-density ABS material according to the original size. The dense blown film cloth and HEPA filter paper with activated carbon particles eliminate odors, purify the air and absorb harmful substances. For better suction, good breathability will not cause the motor to overheat, thus extending the life of the vacuum cleaner. High-efficiency filter: Made of high-strength and environmentally friendly materials, the high-efficiency H12 Hepa filter removes 99.98% of dirt, hair and debris as small as 0.3 µm (0.00003 mm). Powerful filter for deep cleaning of the house Easy to use and install: Easy to install and long service life. Replaceable in