3-STAGE FILTRATION: The -h128 replacement filter has a three-stage filter design. The first pre-filter layer filters particles such as pet hair and fur. The second H13 HEPA filter reduces 99.97% of dust, PM2.5 and dirt in the . The third layer of activated carbon filters removes odours. A comfortable and safe environment for your children and family REPLACEMENT CYCLE: The of a filter can the efficiency of your purifier, thereby ensuring and safe in the room. It is recommended to replace the -h128 h13 filter 6 months. Material: HEPA+ sponge Color as shown EASY INSTALLATION: Get in a few steps 1. remove the filter cover 2. unwrap the -128 filter 3. place the filters into the purifier 4. replace the filter cover Package Contents: 2 x filter Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.