Woodway Flat Top Post Cap 4 x 4 &ndash; Treated Copper Outdoor Fence Cap for Garden, Deck and Patio A decorative flat top fence post cap made out of sturdy wood and treated copper, guaranteeing elegant durability and longevity. Woodways treated copper flat top fence post caps naturally add visual appeal to any home whether it's a fence, deck, pergola, arbor, lattice or gate. Weather resistant wood construction with treated copper plating that is designed to handle the outdoor elements with ease. This copper-plated outdoor post cap provides top protection to your posts, it will not fade or split at the corners. Easy to install, measuring 4 by 4 inches, made with abetted block for better securing of the post cap molding. Fits 3.5 inch post.