Cohline’s precision-engineered range of metal tubing is specifically designed to meet the stringent requirements of diesel injection and brake line applications in modern vehicles. Manufactured from high-grade steel and corrosion-resistant alloys, these rigid lines provide exceptional durability, pressure resistance, and dimensional stability under extreme operating conditions. The tubes are available in a variety of diameters and wall thicknesses, and we also supply a full range of compatible end-forming options and connector types, which can be purchased directly from Cohline to ensure seamless system integration. Rigorously tested for vibration fatigue, thermal cycling, and long-term corrosion resistance, Cohline’s metal tube assemblies are trusted by leading automotive manufacturers for their reliability, performance, and compliance with global safety standards.