Use this Ceiling Armor 3-sided Wall Ceiling Tee to finish off 2' and 4' wall angle pieces (items # 4818-2W and 4817-4W) on your ceiling tile grid. Rusty, discolored or soiled ceiling grid systems can be restored easily with these easy to install ceiling grid accessories. The washable solid vinyl cover is suitable for ceiling grid systems in a wide range of establishments. Package of 50.