5100500040402000 Features: -Post cap.-Great for hiding any irregular or out of square post ends.-Helps to prevent moisture from rotting the tops of your posts.-Designed to fit over a 4" x 4" post. Color/Finish: -Finish: Western red cedar.-We recommend coating with a good quality exterior wood finish.-To install simply apply exterior caulk to the inside of the cap before placing on the post or use galvanized finish nails.