These are the same brake lines we use in our performance kits. They are extended in length, Teflon-lined, stainless steel braided and Kevlar reinforced with an additional protective covering. Our brake lines are made up of 5 layers for optimum strength and every single one is pressure tested. We know our brake lines are used in extreme conditions and are getting hit, pulled on, etc. off-road so we cut no corners. They come with everything you need to install them to the OEM mounts and fittings. These are 33.5" in length (3.5" longer than stock). These are pressure tested to 4,500 psi and meet Federal D.O.T. MVSS-106 standards.