1.GB16897-1997,China3Ccertisfied 2.Work in -40--+120degree 3.OEM services 4.Excellet anti-abrasion and mechanical property 1. Material PA11-6, our special fomular. 2. good quality, closely to PA11 and PA12. 3. Competitive price.JJW air brake hose has features of smooth inner wall,quick air breaking , less pressure lost, wear-proof,anti-aging and good flexible,etc. It is widely used in large scale ...