6 Common metal and their alloys, building materials of metal, namely, composite panels composed primarily of metal; building and construction materials of metal, namely, metal sliding doors, metal runners and frames for sliding doors; non-electric cables and wires of common metal; small items of metal hardware, namely, springs, nuts, washers; sliding guides of metal for operation, management, support or hanging of doors, windows, blinds, drawers, curtains, rigid panels; rails of metal; chains of metal; ironmongery of metal for building, namely, non-powered door actuators; tubes and profiles of metal; nails and screws of metal; fittings for building, namely, fittings of metal for windows, fittings of metal for pipes, metal door fittings; lattices and grids of metal; panels of metal, namely, metal floor panels, metal wall panels; doors and windows of metal; anchoring devices of metal, namely, anchors, metal fastening anchors; devices of metal for opening of windows, non-electric, namely, foot-operated door openers of metal; window protection devices of metal, namely, metal storm windows, metal window shutters; devices of metal for holding doors; non-electric devices for opening doors and windows, namely, foot-operated door openers of metal, window cranks; non-electric devices for closing windows, namely, window cranks; materials of metal for door or window railway tracks; metal wheels for furniture and beds