Frequency: 1.70MHz;Hight Output Atomization quantity .
Ceramic disc diameter is 20mm (no longer come with rubber ring).
Simple to modify and install,This Ceramic Disc is basically used within the household humidifier.
Prime temperature calcined ceramic atomizer, Anti-aging, anti-corrosion, sturdy.
Package contains: 10x 20mm Ceramics Discs ,1x Replacement Key