ITEM NAME:Handheld Spot Welder 18650 Battery Spot Welding Pen Strong Conductivity Description: Use soft silicon wire, composed of multiple strands of core. Ultra-low wire resistance, flexible copper wire, aging resistance. High temperature resistance, oxidation resistance and fire resistance. Strong conductivity. Fine workmanship. Easy to use. long lasting. Suitable for 3.7V to 12V battery DC spot welding machine to be used by electric welding machine Specification: Material:Copper Size:Approx.105x40x20mm/4.13x1.57x0.79inch Package Includes: 1 Piece Spot Welding Pen SKU: DMO0011506673021395.Strong conductivity. Easy to use. long lasting. Suitable for 3.7V to 12V battery DC spot welding machine to be used by electric welding machine. 1 Piece Spot Welding Pen. High temperature resistance, oxidation resistance and fire resistance.