Features:100% brand new and high quality The diameter of the ceramic disc is 16mm. Easy to change and install. This ceramic disc is mainly used in household humidifiers. High temperature calcined ceramic atomizer, anti-aging, durable. Easy to operate and long service life.Package Includes:1x Fogger Ceramics DiscsSpecifications:Material: Plastic + MetalWeight: 6gDiameter: 16mm/0.63inchNominal Frequency: 3mhznote: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.