Woodway Flat Top Post Cap With Ball Accent &ndash; Treated Wood Fence Post Cap for Garden, Deck and Patio, 4 x 4, 1 PC Decorative ball top post cap made out of strong Western white woods. Wood is treated with a natural oil stain. This flat top post cap with ball accent adds visual appeal to any fence, deck, mailbox or lamp post. Weather resistant construction that is designed to handle the outdoor elements. SPF wood is known for durability. This post cap prevents water from settling in your posts. Made with quality it will not fade or split at the corners. Easy to install, fits common post measurement 4 x 4 and is made made with rabbeted block for a secure fit.