Low heat. Good thermal stability. Frequency and static capacitance strong consistency. Resonant impedance is low. The average length of life. It can be widely used in a variety of ultrasonic cleaning equipment. High performance: mechanical Q value, high vibration efficiency. Powe: 35W Resonant frequency(KHz): 40 1 Static capacitance(pF): 8500 10% Resonance impedance: less than equal 20 Ohm Insulation resistance(2500V DC): greater than equal 100M Ohm Material:ceramics colour:White + Gray Package Contents: 5 x Piezoelectric Ceramic Sheet Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.