Metal building materials, namely, non-electric cables and wires of common metal, binding screws for cables and non-electric cable joints, metal sealing caps, metal ironmongery, namely, bolts, nails, rivets, screws; small items of metal hardware, namely, nuts, washers, springs, tubes; goods of common metal not included in other classes, namely, rings, pipes, bolts, disks, valves, casings; fittings of metal for compressed air ducts and for machine belts; cleats and tappets of metal for machine ...