Building and construction materials, namely, packing members in the nature of plastic brackets, wedges, blocks, and fixing lugs used to install, position, support, secure, and protect windows and door frames; plastic brackets to protect the corners of windows and doors; non-metal end caps; non-metal windows, window frames, window locks, window facings, doors, door frames and door locks; plastic building products that are parts of windows and doors, namely, air vents that enable air to circula...