4Pack Replacement Filter Cartridge & Check Valve Maintenance Kit for Air Purifier

Made of high-quality activated carbon sponge, these filter cartridges are designed to replace worn parts in your home air purifier, helping maintain steady equipment operation. | Each set includes 4 filter cartridges and 4 matching check valves, providing full replacement parts for your routine equipment care. | For optimal performance, replace filter and valve parts every 6 months to keep your air purifier working efficiently. | These replacement parts are designed for quick and hassle-free swap, no complicated disassembly or extra tools needed. | If you have any questions about usage or compatibility, please feel free to contact our customer service team anytime.