Features: brand new and high quality This humidifier desalination filter helps prevent and reduce white dust caused by minerals in hard water. The desalination filter can help extend the life of the humidifier, purify the water, and prevent odors. Size: Approx. 2.3x4.6cm/0.9x1.8inch, for most ultrasonic humidifiers of 1 gallon or larger. Easy to use, just put a humidifier filter into your humidifier water for tank and it will start working. The package includes: 10 Pcs/12 Pcs Filter Element. Specifications: Material: Plastic Quantity: 10/12 Size: Approx. 2.3x4.6cm/0.9x1.8inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 10/12 Pcs Filter Element This humidifier desalination filter helps prevent and reduce white dust caused by minerals in hard water. The desalination filter can help extend the life of the humidifier, purify the water, and prevent odors. Size: Approx. 2.3x4.6cm/0.9x1.8inch, for most ultrasonic humidifiers of 1 gallon or larger. Easy to use, just put a humidifier filter into your humidifier water for tank and it will start working. The package includes: 10 Pcs/12 Pcs Filter Element.