Gicos 57668 Radiators Humidifier, Ceramic, US Flag Design (Pack of 5) Size :15.5 x 7 x 3cm - Material: Ceramic Practical radiators humidifier equipped with universal hook, that fit easily onto covered radiators and free-standing units Humidifier improves the air quality in the room by adding humidity trough natural evaporation Just fill it with tap water and attach it to your radiator No need for filters or chemicals like antibacterial or cleaning solutions