These are outdoor extension lines with light. The inner core has two or three cores, made of copper clad aluminum. What we have been selling is 8 pieces of outer diameter, 7.5, 6.8, etc., and the length is 4, 6, 8, 10, 15 and other colors. We sincerely hope that the customers we need can come to our factory. Our side is a small factory, but we are pursuing good quality and low price. The quality of things is not only up to the standard, but the price is very attractive. We look forward to your participation