Uses physical chemistry performance fine PA-12 is the material production. Nature light, soft, pressure resistance, has good bears the stress dehiscence and the dynamic fatigue, has in the nylon the minimum water-absorptive, its product size stability high service life is long, can in - 40íµ~+100íµ the temperature range the normal work, the oil resistance be prominent, size stable performance. Mainly uses in the automobile petroleum pipe line, the brakes tube, the pressure tube, the solenoid and as well as in the air operated outfit pneumatic tube. Its good overall performance is the copper pipe, the steel pipe, the rubber pipe is unable to compare, is the substitution copper, the steel, the rubber ideal material, and installs easily, easy to operate. The PA12 nylon tube specification is as follows: 4í-2.5 5í-3 6í-4 7í-5 8í-6 10í-8 10í-7.5 12í-9 14í-11 16í-13 18 í-15 Note: 1. Material density 1.05íß1000 kilogram/cubic meter. 2. Working conditions: a. Pneumatic system - 40~+100. B. Compressed air. or pneumatic brake system - 40~+60.