Lining : Uniform lining of suitable rubber compound resistant to all grades of petroleum and blended products having aromatic hydrocarbon content not more that 25% Reinforcement : Plies of natural synthetic woven fabric rubberized with a suitable compound and two helical GS wires. (as per IS 28078) embedded in the reinforcement plies in the case of smooth bore and in rough bore hose, the first is internal and the second is embedded.