Kit Contents: (1) 25 ft. coil 3/16 in. steel tubing; tube nuts for SAE thread, inverted flare as follows: (10) 3/8 in. X 24, (2) 7/16 in. X 24, (2) 9/16 in. X 18, (2) 1/2 in. X 20. AGS coils are the same steel tubing as used in our pre-made lines. This AGS coil and tube nut kit is an economical solution for shops that want to build their own lines, custom lengths or non-standard applications. Entry-level steel replacement line is an excellent choice for aftermarket fluid transfer line repair and replacement. Our steel lines and tubing are constructed with safety and longevity in mind. AGS steel tubing is produced by wrapping copper-coated steel around itself twice to form the tubing. This double-wall tube is what provides the strength and structural integrity to withstand the extreme pressures required, yet still remain pliable enough to be formed and bent to the shapes required to be routed beneath the vehicle. The finished tube is fused and zinc-coated for excellent rust and corrosion resistance properties. AGS standard steel line has historically been the choice of professional installers/mechanics and do-it-yourselfers. When properly installed, AGS steel line can provide a long-lasting repair or replacement for many types of vehicles and for all types of fluid transfer systems, including braking systems. However, for harsh environments where snow, road treatments, salt air, etc.. are common or when the longest replacement life is required; the best choices are AGS premium lines like Poly-Armour and NiCopp. – These offer excellent resistance to Rust and Corrosion, are DOT Approved for Hydraulic Brake Systems as well as being able to bend and form without kinking – Available in coils, kits or preformed lines.