Fits for true 2.5" x 2.5" square post, the outside dimension of this glossy black cap cover is 2.75" X 2.75" Made from high-quality aluminum(A360), with great powder-coated finish, and long-lasting usage, better than plastic Easy to install, Pressure fit Decorates your fence post, and portect it from damage that can be caused by sun, ice, water and so on, extends the life of fence post. Good service: If you have any concerns about the product or installation, please feel free to contact us at the first time, we'll solve it in time. We are specializing in producing hardware since in 1998. We are devoting ourselves to researching, developing and producing high quality hardware all the time. Our mission is to provide the best quality products for the customer all over the world. Features Easy installation, press- fit , it won’t come off to easily Fits: 2.5" x 2.5" aluminum fence posts Material: Aluminum Color: Powdered coated glossy black Style: standard flat