Perfectly compatible: The cylindrical filters are suitable for WD3, WD2, WD1, MV3, MV2, A, K, KNT, NT,VC vacuum cleaners.For Krcher compact battery WD1, WD2, WD2 Plus, WD2 Premium, WD3P, WD3, WD3 battery, WD3 Premium, WD 2.200 to WD 2.250, WD 2.400 M, WD 2.500M, WD 3.200 to WD 3.800M, MV2 MV2, 3. MV3P, A2004, A2054 ME, A2101, A2120, A2204, A2254, A2604, A2654, K2000, K2150, K2301, K2901, K4000, KNT2 Premium, replace original filter: 6.414.-547.0, 6.414-772.0, 6.414-552.0High-quality material filter element: Vacuum cleaner spare parts high-quality HEPA filter paper and melt-blown cloth are used, and 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 odors, purify the air and absorb harmful substances.High-efficiency filter: SE 4001 filter made of high-strength materials, environmentally friendly and efficient.The filter removes 99% of dirt, hair and fine deposits down to 0.3 m for a thorough cleaning of your home.It filters fine dust particles up to 40 m (= 0.04 mm), such as dust, smoke particles, bacteria, viruses, pollen, mites.Easy to use and install: WD2 filter for Karche A2574, A2604, A2654, A2656, A2674, A2675 A2676, A2901, A3000, A3100, A4000, A2000, K20000, K215.0, K23.01, K2901, K4000 are easy to install and durable.Changes in seconds without exposure to dust.These vacuum parts can be cleaned and reused.It is recommended to replace the vacuum cleaner wd3p filter every 3 months for optimal performance.SATISFACTION GUARANTEEOur core philosophy is to provide customers with satisfactory products and services.If for any reason you are not satisfied with your Yulado vacuum cleaner filter or our service, please contact us and we will make sure you find a satisfactory solution.