Ion Cartridge Ion cartridge with antibacterial effect by Ag+ Ideal for humidifying air purifiers. - Model Name: FZ-AG01K1 - Type: Ion Cartridge - Features: Antibacterial effect by Ag+ - Applicable devices: Humidifying air purifiers - How to use: Easy to attach to the tank cap I am selling this because I replaced my humidifier. The box is dirty, but the product is new and unused. Thank you for looking. Please understand that this item has been stored at home.