... , ISO9001:2000, DOT certificate Double layer nylon tube reinforced tube :1).Material: PA, Nylon ,Polyamide2).Size: O.D.× I.D. (mm)Wall thickness ... ~+120°C, Explosion pressure:1.5-15MPa4). Certificate: TS16949:2009, ISO9001:2000 , DOT certificate5). Feature:Smooth surface,wear-resistant,resistant to high ... --Double layer nylon tube,double braided tube,reinforced tube double wall nylon tube