USE: Used to convey compressed air and insert gases in mining, civil engineering construction, ship building and casting industries. at the irregular pressure. Inner layer: black, smooth, wear-resistant, Reinforced layer: One wire braid reinforcements Outer layer: Blue, smooth, wear-resistant, Material: The main raw materials are polyurethane and crystalline silicon, the auxiliary materials are NBR, SBR , PARA rubber and special reinforcing filler. Temperature range: -20? to +50?