Perfect Compatibility: Cartridge filter for Kärcher 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 Premium Materials: Using premium HEPA filter paper and Melt Blown Cloth, the product is made of high-density ABS material according to the original size. The dense melt-blown cloth and HEPA filter paper, with activated carbon particles, eliminate peculiar smells, purify the air and absorb harmful substances. For better suction power, no overheating of the motor thanks to good air permeability and therefore a longer service life of the vacuum cleaner. High-efficiency filter: Made of very durable and environmentally friendly material, the highly efficient H12 HEPA filter can remove 99.98% of dirt, hair and small debris down to 0.3 µm (0.00003 mm). Powerful filter for deep cleaning of the house. Easy to use and install: Easy installation and