These are outdoor extension wires. The inner cores are two core and three core. They are 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. We are small factories here, but we are pursuing high 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