Durable White PVC Vinyl Gothic Post Cap For A True 3.5 Inch X 3.5 Inch Post | Single Pack | AWCP-GOTHIC-3.5 The Gothic cap fits externally on a true 3.5 in. x 3.5 in. post | Will also fit on a standard 4 x 4 wood post (usually measure to 3.5 in.x 3.5 in.) | Simple to install | Made in the U.S.A. Manufactured from high quality, durable PVC vinyl | Will not fade, discolor or warp | UV Resistant | Water Resistant | Limited lifetime warranty Perfect for a fence, deck, or mailbox post | Maintenance Free: Simply slide the Gothic cap onto your post. Set it and forget it. | Use clear silicone (not included) for outdoor use to secure the cap (optional) Maximum profile dimensions: 3.510 in. x 3.510 in. | Corner Radius: .125 in. | Total height: 7.25 in. | Overall Outside Dimensions: 3.625 in. x 3.625 in. | Color: white Add a unique, finished look to your deck or fence with the Vinyl Gothic Post Cap