These are in our opinion, the finest air-cooled Porsche 911 bolt-on brake lines available.Two front and two rear lines included. Â PTFE (teflon) 1/8in ID line covered with stainless steel braid followed up with your choice of colored vinyl coating with DOT required markings to protect from rubbing. Hoses are DOT legal and burst tested.Direct bolt-on replacement using premium materials to eliminate sponginess in the pedal and supply a more immediate braking effect. Â Compared to rubber lines, stainless braided brake lines will not expand or bubble under pressure. Â ThisÂ eliminates sponginess in the pedal and supplies a more immediate braking effect.Compatible with DOT 3,4, or 5 brake fluid.Hoses are made in Richmond VA and come with a limited lifetime warranty.