Check the listing for details. 110V Portable Ultrasonic Plastic Welder Ultrasonic Spot Welding Machine. Color: Grey, Condition: New, Made in Unknown. Listed at 371.00 USD. Description The ultrasonic spot welder is a safe and environmentally friendly equipment, which can accurately complete various welding tasks. It also provides cost-effective solutions for the manufacturing industry. Whether for large factories that pursue production efficiency or precision machining enterprises that focus on welding accuracy, it is a rare and ideal choice. Key Features Durable & Sturdy: The sheet metal and iron shell with baking paint and an aluminum alloy head of the welding gun make this product more corrosion-resistant and wear-resistant, providing good long-term performance. High Working Efficiency: It has an amplitude of 30-50um, a power of 200-700W, and a welding frequency of 28khz, combined with an advanced MCU control system and triode control to be used for effi.