20khz 2000w Ultrasonic Piezoelectric Welding Transducer With Titanium Booster for Zipper Plastic Bag Machine Add to Inquiry 15K 4200w High Power Ultrasonic Welding N95 Masks Transducer Converter Add to Inquiry 2000W 15KHZ/20KHZ Piezoelectric Ultrasonic Welding Transducer Disposable Medical Mask Add to Inquiry 20Khz 2000w Ultrasonic Plastic Welding Machine Transducer For Ultrasonic Spot Welding Machine Add to Inquiry 2000W Ultrasonic Welder Converter Transducer For Ultrasonic Welding Machine Add to Inquiry 1213141516