Your deck or fence can have the look of real stacked gray fieldstone at an economical price. Cast stone post covers transform posts and corners of any deck or fence project into magnificent, stately pillars. The strong, fiberglass-reinforced concrete looks like stacked stone but is much easier to install. The covers fit over standard 4 in. x 4 in. or 6 in. x 6 in. posts. Post covers are 53 in. high and 8 in. sq.