The shapes and sizes of the end of the tubes are like the figure below (manufacture optional according to the demands of purchasers)

Hard tubes for auto break system: It is mainly used for auto break system, fuel system, turning system and cooling system. The material is double wall copper brazed tube. Inside surface is copper coated and outside surface coating is described as ...

Flexable tubes :They include brake tubes ,transport oil tubes .The best material is used in the process of manufacture .Our products are burst resisting,high pressure resisting and wear -resisting.They are connected reasonably.