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 Top quality materials: using Premium HEPA filter paper and Melt Blown Cloth, 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 fluffy odors, purify the air and absorb harmful substances. No overheating of the motor thanks to good air permeability, for better suction power and longer life of the vacuum cleaner. High pressure filter Efficiency: Made of highly durable and eco-friendly material, 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 a thorough cleaning of your home.