Upgrade, replace, or maintain your brake, fuel, or transmission lines with our 3/8 copper-nickel tubinga single 25-ft coil that meets Oem specs with a 3/8 outside diameter and 0.028 wall thickness. Made from premium /10 copper-nickel alloy, this Dot-approved tubing resists rust, corrosion, leaks, and vibration while maintaining a clean interior and exterior finish for reliable performance. bends 58 easier than steel, allowing you to shape by hand or flare with any tooleven the most basicmaking for DIYers and professionals alike. Conforming to Sae J1047, J1290, J1650, 4038, and GM123M standards, this tubing is worth the extra cost over zinc or stainless when you need effortless bending and flaring without sacrificing durability.