Kunifer Brake Pipe Sets - AlfaStop offers a range of brake pipes and pipe sets which are only available from AlfaStop. Available in Kunifer (a copper nickel iron alloy) pipe with brass pipe fittings, they have been developed over the years in conjunction with owners of each model to ensure a good fit. Kunifer is virtually rust free. Pipes sets are supplied coiled and are easily shaped when being installed on the car.