2. Made from TORAY H11 HEPA high efficiency pariculate air with fold mountain shape, witch has the expanding area of 3 square meters, and has strong capacity to absorb PM2.5, and even PM 0.3.
3. Easy to apply it to your Xiaomi air purifier 1 or air purifier 2. Please note that youd better to replace it twice a year.
4. Material: HEAP.
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