Woodway Glass Post Cap 4 x 4 &ndash; Glass Pyramid with Cedar Wood Base Outdoor Post Cap for Garden, Deck and Patio, Black, Pack of 12 A decorative black glass post cap made out of sturdy cedar that withstands tough outdoor conditions. Woodways glass fence post caps add visual appeal to any home whether it's a fence, deck, walkway, or gate. Weather resistant construction that is designed to handle the outdoor elements. Cedar is naturally rot and pest resistant. This glass post cap provides top protection to your posts. With secure post cap skirts, they will not fade or split at the corners. Easy to install, fits common post measurement 4 x 4 and is made with rabbeted block for a secure fit.