windows and doors, not of metal; building materials, not of metal, namely, window frames, window sashes, window casements and door frames; rigid pipes, not of metal, for building; frames for windows and doors, not of metal; battens for glass, not of metal being wooden building materials; drain pipes, not of metal; shutters, not of metal; window frames, not of metal; cornices not of metal and mouldings, not of metal, for cornices; jalousies, not of metal