【Copper-Nickel Brake Line Kit】Nstarsmotor brake line is made of genuine copper-nickel alloy, which is non-magnetic. It is easy to double-flare and make bends along the line. Copper-nickel brake lines are not only a rust-free choice, but also offer superior longevity in all road conditions compared to traditional steel lines. 【Rust and Corrosion Proofing】Copper-nickel brake lines are the longest-lasting option, far outperforming standard steel tubing. Since the brake lines are located under the vehicle and are often exposed to moisture, dirt, snow and road salt, the rust and corrosion protection of the copper-nickel line is very important. 【Complete Brake Line Kit】Includes 16 Fittings: 2 x 3/16” (7/16-24) Inverted Tube Nuts, 10 x 3/16” (3/8-24) Inverted Tube Nuts, 2 x 3/16” (1/2-20) Inverted Tube Nuts, 2 x 3/16” (9/16-18) Inverted Tube Nuts. 【High Quality & Material Composition】Nstarsmotor Copper-nickel brake line meets all SAE and ISO specifications and the tubing is the best quality tubing on the market. Material composition - 88.1% Copper, 9.7% Nickel, 1.4% Iron, 0.8% Manganese. 【Lifetime Warranty】You can return or exchange the brake line at any time. If you have any questions, please contact us and we will provide a prompt, satisfactory response. We are a professional manufacturer of fuel, transmission and brake lines, and we use genuine copper-nickel material for all our tubing. 【Professional Factory】We are a professional manufacturer of fuel, transmission and brake line,and using real copper nickel material to produce tubing.