Cozypuff Humidifier Demineralization Cartridge Replacement for DREO HM306 HM311 HM311S HM524 HM524S HM409S HM420S HM321 HM312 4 Pack

【Wide Compatibility】 Designed for DREO HM306, HM306S, HM311, HM311S, HM524, HM524S, HM409S, HM420S, HM321 and HM312 humidifier models, providing a practical replacement option for daily humidifier care. 【3-Layer Purification Design】 Features a multi-layer cleaning structure with silver ion pellets to help reduce mineral content and unwanted substances in water before mist output. 【Cleaner Mist Performance】 Helps improve water quality inside the humidifier and supports a fresher mist experience for comfortable indoor air conditions. 【Reduced Mineral Buildup】 Helps limit mineral accumulation inside the humidifier, supporting smoother operation and reducing the need for frequent cleaning. 【4 Pack Replacement Set】 Includes 4 demineralization cartridges, with each cartridge capable of filtering up to 150 litres of water for convenient replacement planning.