Yuanfilter Humidifier Air Purifier Replacement Filter FZ-D40SF fits for Sharp air purifier KC-D40-W, KC-E40-W, KC-F40-W, KC-G40-W. Our replacement filter uses polypropylene and polyester material that captures PM2.5, pollen, allergens (dead and death), mold, dust, dust and grime, bacco smoke (particles), pet hair and so on, keeping the room clean.The dust collection and deodorizing integrated filter holds activated carbon inside to reduce the resistance to airflow, and improve the suction effect. It can effectively removes cigarette, toilet, raw waste, pet odors, and cooking odors,and provides a clean air. It is a very good replacement filter for Sharp humidifier air purifiers.