The Lincoln ED022950 .025 L-56 2 lb SuperArc Copper Coated Welding Wire is a high-quality welding wire manufactured by Lincoln Electric in the United States. This welding wire is made of copper and has a diameter of 0.025 inches, providing precise and efficient welding results. With a roll weight of 2 lbs, this unit is ideal for various welding projects, ensuring strong and reliable welds. Please be aware that this product contains a California Prop 65 Warning due to potential health risks associated with the material.