1.Ultrasonic plastic welder (powerful ultrasonic plastic welding machine) 1) Sturdy and powerful, Fine steel booster for long service life 2) Imported piezoelectric ceramic , Suitable for large size work pieces welded 3) two converter + one booster . (each converter is 4 pcs piezoelectric ceramics ) 4) Auto frequency tracking, over-voltage protection strong and stable power output 5) High-quality world famous elements adopted 6) With CE certificate2. Scope of Application Plastic toy, household appliances, stationery, automobile rubbers, daily commodities, packages, cosmetic and so on