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 26 strands of 0.16 copper wire in each circuit, and high-purity oxygen free copper has excellent conductivity, lower resistance and higher conductivity compared to aluminum wires. 20/5 wire has the characteristics of high conductivity,low resistance,soft,and can be twisted and extended at will Easy to peel and cut.and suitable for low voltage (5V-110-300V) installations. Electrical wire come in simple packaging to ensure you get a high quality product at an affordable price,if you have any questions please contact us and well be happy to resolve any issues! 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!