nickel copper lines are all I will ever use to replace inferior OEM lines found on domestic (American) cars. It is very easy to work with, both when forming/bending a line and creating flares for end connections. Best of all, this type of brake line will not rust. If you live in an area where salt is used on the roads in winter and you drive an old domestic car, you'll probably need to replace your brake lines after a while. ten years. The nickel-copper lines will survive the rest of the car.