Kit Contents: (2) 25 ft. coils 3/8 in. NiCopp tubing; (1) Complete 24 part number SAE and Metric assortment of tube nuts, adapters, and unions for both inverted and bubble flare connections. AGS's NiCopp is a nickel-copper alloy brake tubing that has many benefits over steel tubing. NiCopp is bendable by hand, flares easily, and will not rust. NiCopp has the strength and structural integrity of steel lines but with the added benefit of being corrosion resistant. This alloy is approximately 9.2 percent nickel, 1.4 Percent iron, 0.8 Percent manganese, and 88.6 Percent copper. NiCopp has been used on hydraulic/fluid transfer systems on vehicles where steel lines and tubing are commonly used.