Non-metal fully enclosed covers for HVAC system drain lines, condenser lines, and power lines

Building materials, namely, plastic pipe supports, pre-cast concrete wall forms, non-metallic covers for ducts, tubes and polymeric duct assemblies, composite panels composed primarily of nonmetal materials, railings, not of metal, non-metal bonding fasteners for mounting and demounting ducts, cables and pipes; rigid pipes, not of metal for building; ducts and other casings for cables, not of metal; fittings not of metal, non-electric for ducts