Structure for Concrete Pump Rubber Hose: inner layer rubber, enhancement layer, outside layer rubber. 1. Inner layer rubber: polyurethane and butyl rubber are the mainly material, and put in special reinforced material to make mixed rubber. It is high wear resistance, high toughness, high pressure, smooth and so on. 2. Enhancement layer: 4 layer of steel wire , the use of copper wire braided hose, bearing the work pressure is the ordinary hose 3-4 Times, with a high degree of resistance, flex features superior performance, enhancing effect. 3. Outside layer rubber: Black, smooth (wrapped), SBR/NR compound, anti aging, wear resistance.