The Brace Band has an internal diameter of 2-3/8” and fits a 2-3/8” terminal post. The brace band coupled with a Rail End Cap (not included) helps you attach the top rail to the terminal posts of your chain link fences. A Brace Band, a Rail End Cap and a Post Cap complete the requirements for one of your fence post. This galvanized product prevents any rust formation and increases the longevity of the product and of your fence. The smooth finish not only keeps the weather at bay from the project but also provides an attractive look to your fence. All the Best Pro products are manufactured from the best quality rolled steel with tough powder coat for a lasting professional finish.