Z sections or any other rolled sections); (vi) sheets, hoops, strips and skelp, both black and galvanised, hot and cold rolled, plain and corrugated in all qualities, in straight lengths and in coil form, as rolled and in revitted condition; (vii)plates both plain and chequered in all qualities; (viii)discs, rings, forgoings and steel castings; (ix) tool, alloy and special steels of any of the above categories; (x) steel melting scrap in all forms including steel skull, turnings and borings, (xi) steel tubes, both welded and seamless, of all diameters and lengths,including tube fittings; (xii)tin plates, both not dipped and electrolytic and tin free plates; (xiii)fish plate bars, bearing plate bars,crossing sleeper bars, fish plates, bearing plates, crossing sleepers and pressed steel sleepers, rails heavy and light crane rails; (xiv)wheels, tyres, axles and wheel sets; (xv) wire rods and wires rolled, drawn, galvanised, aluminised, tinned or coated such as by copper; (xvi)defectives, rejects, cuttings or end pieces of any of the above categories.