The heavy-duty cable adopts more advanced production technology, with a layer of non-woven fabric wrapped between the outer sheath and the core wire, and cotton thread filled in the middle of the core wire to ensure sufficient flexibility and increase tensile strength, making it very suitable for dynamic and static use! There are 41 strands of 0.254 copper wire in each circuit, and high-purity oxygen free copper has excellent conductivity, lower resistance and higher conductivity compared to aluminum wires. Widely used in various low-voltage electronics wiring,it can be used for solar panels DC circuits,boats,automobiles,LED and inverter wiring,etc. The superior quality copper wire has a very soft black sheath that brings its incredible flexibility and convenience to your electrical work. we commit to provide high quality products and customer satisfaction, The electricity wire we provided passed UL harsh testing that guaranteed long lifespan usage. The heavy-duty cable adopts more advanced production technology, with a layer of non-woven fabric wrapped between the outer sheath and the core wire, and cotton thread filled in the middle of the core wire to ensure sufficient flexibility and increase tensile strength, making it very suitable for dynamic and static use!