45*15*5mm PZT-8/PZT-4 Piezoelectric Ceramic Ring 28khz/35khz 800W Ultrasonic Welding Transducer With Boos Add to Inquiry 35*15*5mm PZT-8/PZT-4 Piezoelectric Ceramic Ring For 50W 28khz/40khz Ultrasonic Cleaning Machine Transduc Add to Inquiry 10x5x2mm PZT-8/PZT-4 Piezoelectric Ceramic Ring For 33khz 50W Medical Teeth Cleaning Ultrasonic Transduc Add to Inquiry