We use high-quality Copper/Aluminum tubes, offering excellent toughness and hardness. Utilizing Copper/Aluminum pipes, our products offer flexibility, allowing bending and straightening without breaking. They resist pulling and bending, with sufficient length to connect indoor and outdoor units. Even when encountering corners that require bending, piping is easily managed. The Copper/Aluminum tube contains high-pressure and low-pressure tubes, designed specifically for mini-split air conditioning systems used in homes, offices, malls, restaurants, and similar spaces. We strictly control the materials used, rejecting inferior ones. Features & Details 25FT Copper/Aluminum Tube: With a length of up to 25ft, the Copper/Aluminum tube can easily connect indoor and outdoor units even over long distances without difficulty. High and Low Pressure Dual Pipes: Includes 1/4” high-pressure tubes and 1/2” low-pressure tubes, compatible with 12000-18000 BTU split air conditioners, specifically designed for mini-split air conditioning systems. Thickened Copper/Aluminum Tube: Utilizes high-quality Copper/Aluminum tubes meticulously controlling the wall thickness of both high-pressure and low-pressure tubes, providing excellent toughness and hardness, eliminating the frustration of thin Copper/Aluminum tubes easily flattening with a single fold. Multiple Installation Accessories: Comes with connecting cables, drainage pipes, 2 tie wraps, decorative covers, wall sleeves, 2 sealant putties, and other accessories, making installation easy without the need for welding.