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【Compatibility】Perfectly compatible with HSP001 Air Cleaner Purifer.Fit snugly with your machine

【4 Stages of Filtration】Including 1 Set (2pcs) replacement filter of 4 layers such as blue pre-filter,H13 True HEPA Filter,activated carbon filter and cold catalyst filter

【High Efficiency】4 layers filters help to remove fine particles from the air more efficiently

【Replacement Frequency】It is recommended to replace the filters set every 6-12 months depending on using environment