Fire Extinguishing Sys Bent Tube

A bent hollow item, welded or seamless, which has been perforated at intervals along the length for use in aircraft, automotive equipment, or building fire extinguishing systems. It has a round, square, or any other cross section, with a continuous periphery. It may include end fittin (s) but not more than one on each end. Excludes tube assembly, fire extinguishing system; and pipe, bent, fire extinguishing system.