Aviaries not of metal; Balustrades, not of metal; Branching pipes, not of metal; Building materials, namely, plastic pipe supports; Ducts, not of metal, for ventilating and air-conditioning installations; Non-metal bird baths being structures; Non-metal gutter pipes; Non-metal swimming pools; Plastic landscape edgings; Water-pipe valves, not of metal or plastic; Water-pipes, not of metal