SWR hoses have a reinforcement of PVC insulated high carbon grade II spring steel & hard spring PVC wire. Also available in highgrade III for heavy duty pipes.By introducing high tensile spring steel wire or PVC wire for reinforcement which gives very strongcrushing resistance, the hoses become ideal for use for conducting electrical wiring, suctions, ducting and exhaust of fume. gases andfor other industrial uses ideally suited for electrical wire conducting, connecting switch boards, bus-bars, switch gears metro trains and panels. Excellent flexibility and can be bent on its own axis. Useful for connection of wiring when the hoses are required to be roughly handled. Most ideally suited for making connection in machine tools.