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 of Melt Blown fabric, the product is made of high density ABS material according to the original size. Dense blown fabric and HEPA filter paper, with activated carbon particles, eliminate peculiar odors, 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 life of the vacuum cleaner. High-efficiency filter: Made of high-efficiency material strength and eco-friendly, the highly efficient H12 Hepa filter can remove 99.98% of dirt, hair and small debris down to 0.3µm (0.00003mm). Powerful Filter for Deep Home Cleaning Easy to Use and Install: Easy installation and long life. Replacement in