LEVOIT Core 300 Air Purifier Replacement Filter, 3-In-1 Filter, Efficiency Activated Carbon, Core300-RF, 2 Pack, WhiteBrand: LEVOIT Color: White Features: : Core300 RF for the genuine Levoit replacement filter to ensure what you're buying is worthy of your investment : Designed for Levoit Core300 P Core 300S Pair purifier to maintain its peak performance. With cost effective price to save much cost for your all year round air cleaning need. It is recommended to replace filters every 6 8 months : While the ultra fine Nylon Pre Filter and Activated Carbon Filter