Description: Ultrasonic piezoelectric transducer. Diameter: 50mm/1.97inch; Thickness: 2.5mm/0.1inch. Power: 35W; Resonant Impedance: ?5?. Radial Resonant Frequency: 43 ±5%KHz. Used for 35W ultrasonic cleaner transducer repair kit. Specification: Static Capacitance: 6500 ±20%pF Load Capacitance: 3500pF Electromechanical Coupling Coefficient: ?0.53 Dielectric Loss: ?0.5% Package Includes: 1 Piece Piezo Ceramic Transducer Disc Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !