With excellent physical and chemical properties of PA - 12 as raw material to produce. Light, soft, compression, good resistance to stress cracking resistance and dynamic fatigue, more has the smallest water absorption in nylon, its products high size stability, long service life, can in - 40 ℃ ~ + 100 ℃ temperature range to the normal work, oil resistance, size stability. Is mainly used for automobile oil pipeline system, pressure pipe, spiral pipe and pneumatic complete sets of equipment of the pneumatic tube. Its good comprehensive performance is brass, steel, rubber and incomparable, is an ideal material to replace copper, steel, rubber, and easy to install, easy to use.