1.[COMPATIBILITY]:The LV-H128 replacement filter perfect compatible with LEVOIT LV-H128 / PUURVSAS (HM669A) / ROVACS (RV60) air purifier, Replace Part #LV-H128-RF 2.[3-STAGE FILTRATION]: The lv-h128 replacement filter has a three-stage filter design. The first pre-filter layer filters large particles such as pet hair and fur. The second H13 HEPA filter reduces 99.97% of dust, PM2.5 and dirt in the air. The third layer of activated carbon filters removes odours. A comfortable and environment for your little boy and little gril and family 3.[REPLACEMENT CYCLE]: The use of a filter can improve the efficiency of your air purifier, thereby ensuring fresh and air in the room. It is recommended to replace the lv-h128 h13 filter every 6 months. 4.[EASY INSTALLATION]: Get fresh air in a few steps 1. remove the filter cover 2. unwrap the lv-128 filter 3. place the filters into the air purifier 4. replace the filter cover