Aurora Pyramid Pointed Post Cap, 3-1/2" (4x4 wood) Post, Cast Aluminum, Green Designed to fit a standard nominal 4x4 post that measures 3-1/2" x 3-1/2" Sturdy powder coated cast aluminum construction Inside base measurement: 3-5/8" x 3-5/8", Overall height: 1-5/8", Overall outside width of pyramid top: 4-1/4" Color coated hardware included for installation