6 WINDOW FRAMES, WINDOW SPRINGS AND BALANCES, SASH FASTENERS FOR WINDOWS, AND WINDOW SYSTEMS, NAMELY, WINDOWS, WINDOW FRAMES, WINDOW SPRINGS AND BALANCES, AND SASH FASTENERS FOR WINDOWS, ALL MADE OF METAL
19 WINDOW FRAMES, WINDOW SPRINGS AND BALANCES, SASH FASTENERS FOR WINDOWS, AND WINDOW SYSTEMS, NAMELY, WINDOWS, WINDOW FRAMES, WINDOW SPRINGS AND BALANCES, AND SASH FASTENERS FOR WINDOWS, ALL MADE OF NON-METALLIC MATERIALS EXCEPT GLASS