1. The sealed two-stage 360 degree filtration system is composed of HEPA filter and activated carbon filter. It can effectively filter 99.97% of pollutants as small as 0.1 Micrometre. For allergies, rhinitis patients and young children to give the most beneficial protection.<br> 2. The activated carbon filter in this kit contains more activated carbon particles than other products. The adsorption effect of activated carbon particles can better enhance the filtering effect of the air purifier. Because there are more activated carbon particles, it is second to none in removing odors. Give you and your family fresh air.<br> 3. The filter is easy to install and can be cleaned. After washing with warm water and drying in the sun, the performance of the air purifier can be restored to its best state. It can provide you with 12 months of long-term protection.<br> 4. Fit for Air Purifiers Filter,HP04 TP04 DP04 TP05 HP05 Purifying Fans<br> 5. It is recommended that you replace the filter every 6-12 months to extend the life of the air purifier.<br> colour: as shown<br> Material: plastic<br> size: 22x21cm<br> Package Contents:<br> 4 x internal filter<br> 4 x external filter<br> 2 x brush<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.