metal brake tube of motorcycle 1)double wall 2)4.76*0.7,6.35*0.7,etc 3)ASTM A-254-91, A-512-91A 4)power steering, fuel,brake bundy brake tube/double wall metal pipe for motorcycle>in coils/cut-to-length>OEM>usage:refrigeration,petrol pipe, powor steering>ISO 9001, TS16949The low carbon steel brake tube is supplied in single wall and double wall(Bundy Pipe). The products conform to ASTM A-254-91, ...