3/16 in x 25ft NiCopp Nickel-Copper Tubing. 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.Meets SAE Standard J1047 and ISO 4038; meeting all international and U.S. requirements for brake tubing. 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.