4x4 Post Cap | Black New England Pyramid Style Square Top for Outdoor Fences, Mailboxes & Decks, by Atlanta Post Caps Atlanta Post Caps are designed to enhance the look of your fence, mailbox, deck, porch, staircase, or railing while protecting your posts from weather deterioration and natural wear-and-tear for 10 years Easy installation in 4 steps thanks to our patented SNAP-CAP design - simply place the base on your post, secure with 2 screws in the pre-drilled holes, align the cap on the base, and press the cap to snap into place Atlanta Post Caps are made from remarkably sturdy ASA resin, a durable, waterproof, and impact-resistant composite material often used in automobile production and will outlast any wood product on the market You can customize the look of your post caps by painting with outdoor spray paint. If not, the UV stable material means you don't have to worry about warping, fading, or discoloration Your 4x4 nominal post cap is designed perfectly fit nominal/standard sized lumber posts measuring 3.5 x 3.5 up to 3.75" x 3.75" inches (always check your lumber dimensions before purchasing), and comes with one easy-install base & one New England pyramid style snap-on cap