Excellent quality This copper tube has good corrosion resistance and weldability. Easy to reprocess Copper tubes can be processed into various semi-finished products and finished products by cold and hot forging. Excellent electrical conductivity, used in the manufacture of wires, cables, brushes (electricity), etc. Good thermal conductivity Good thermal conductivity, used in the manufacture of magnetic instruments or meters. Plasticity Excellent plasticity, easy to process under hot and cold pressure. Material: Copper Outer diameter: 4mm/0.15in Inner diameter: 3mm/0.11in Length: 2m/78.74in Note: The data are all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.