Mine Used Hose: Diameter:1.5",1.75",2",2.5", ... hose refers to the chloroprene rubber hoses used for coal mine fire prevention, draining water and ventilation, and so on. This ... special performance compared to other lining fire hose. Commonly used for indoor fire prevention, industrial effluent, agricultural irrigation, industrial and mining ... ,14/20,17/250 30/450,42/600,51/750 Mine Used Hose