We are manufacture of Ultrasonic cavitation transducer and item PCB , it can be used on , Ultrasonic caivtiaon , ultrasonic beauty . lost weight and so on , frequency 1 mhz. 40khz, 28khz and so on Type Resonant frequency Static capacitance Resonance impedance Size Power ( KHz pF © D* H W HNM-4SS-1540 40 KHz± 1.0 3500± 10% d25© 18* 56 20w HNM-4SS-2540 40 KHz± 1.0 3000± 10% d25© 30* 50 30w HNM-4AH-3540 40 KHz± 1.0 4400± 10% d25© 45* 55 60w HNM-4SS-3540 40 KHz± 1.0 4400± 10% d25© 35* 55 60w HNM-4SS-3828 28 KHz± 0.8 4400± 10% d25© 45* 79 70w HNM-4SS-3833 33 KHz± 1.0 5400± 10% d25© 45* 61 70w HNM-4SH-3840 40 KHz± 1.0 5400± 10% d25© 48* 52 70w HNM-4SS-3840 40 KHz± 1.0 5400± 10% d25© 40* 58 70w HNM-8SH-3833 33 KHz± 0.8 4300± 10% d25© 48* 61 70w HNM-8SE-3828/ 40 28/ 40 KHz± 1.5 4300± 10% d35© 65* 70 70w HNM-8AS-2535 34 KHz± 1.5 1700± 10% d35© 25* 150 50W HNM-8AE-2540 40KHz± 1.5 1300± 10% d50© 28* 72 50W