... Steel Tube 2. Steel brake Bundy Tube 3.Galvanized brake Bundy Tube 4,Use:automobile brake system5,Standard:ASTM,DIN,UNI,GB6,Material:low carbon steel tube7,Copper plated ... ~Φ12mm Galvanized steel brake Bundy Tube1,Standard:ASTM,DIN,UNI,GB 2,Copper plated,Zinc plated 3,Material:low carbon steel tube O.D ...