Bolts of metal; Building materials, namely, composite panels composed primarily of metal; Drain pipes of metal; Ducts of metal for ventilating and air-conditioning installations; Ducts of metal, for central heating installations; Framework of metal for building; Frameworks of metal; Greenhouse frames of metal; Manifolds of metal for pipelines; Metal components for metal protective and security window shutters, namely, slats, shutterboxes, side frames, end caps, crank handles, pull straps, sid...