18650 Battery Spot Welding Machine Automatic Trigger Spot Welding Pen Nickel Sheet WeldingPen High Instant Current 500A 10 AWG. Welding needle material: imported alumina copper welding needle. Using high-temperature engineering plastics and high-quality aluminum oxide copper alloy welding pins, lower internal resistance can cope with larger welding currents, lower temperature rise, and better feel.
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