... .wide rang service in general industrial service 2.polyester reinforced 3.temperature:-40`C~+90C Rubber Air Hose/Air Rubber HoseTube ... :SBR Natural rubber2.Size: 1/4", 5/16", 3/8",1/2",5/8",3/4",1"3.Color: Red, blue, black, green, yellow ... layer + reinforcing layer ( second reinforcing layer for1/2",5/8",3/4",1")8.outside bond layer; outside surface is mill ...