Gutter pipes, not of metal; branching pipes, not of metal; reinforcing materials, not of metal, for building; building materials, not of metal, namely, composite panels composed primarily of nonmetal materials, non-metal floors comprised primarily of fiber-glass or plastics of commercial buildings and residential use, fascia, soffits; construction materials and pipes, not of metal, namely, blocks of concrete or wood, letter boxes of masonry, trenching in the nature of concrete drainage struct...