AGS's 1/4in Brake Line Replacement Kit (BLFA-9K) is everything you need to produce the highest quality brake lines. Kit Contents: 1 25 ft. coil 1/4 in. NiCopp tubing; 1 Complete 32 part number SAE and Metric assortment of tube nuts, adapters, and unions for both inverted and bubble flare connections. AGS coils are the same copper nickel alloy tubing as used in our pre-made lines. NiCopp is not only more corrosion resistant than steel, but easier to bend and form and has the strength and structural integrity of steel lines.NiCopp Does Not Rust or Corrode. DOT Approved for Hydraulic Brake Systems