... 1.Simple structure, 2.less investment, 3.long using life, 4.convenient operation methods. item specification/tpye descripton Dam ... 8 mm thickness Pad,PlateQB-2Plate adopted mould manufacturing, material of cast steel, galvanized, anticorrosive processing. The pad 5.5 ... elements for different functionsStrength canvas The outer layer is made of the special rubber material characterized by wear, sunlight, ...