ROHN’s R-25AG3 25G top section features the same 12 1/2 in face and 5/16 in solid serpentine zig-zag bracing as the standard 25G tower sections and it also comes with a tapered top and integrated mounting pipe with set screws. The pipe, measured from the apex of the side rails, measures 2 1/4 in OD x 12 in and features to built-in set screws for securing your antenna masts inside the tube.BRBRYou can connect the 9 ft 3 in long R-25AG3 to any standard Rohn 25G tower section using the included bolts and double-bolted leg connections. The entire section has been completely hot-dip galvanized for years of worry-free corrosion protection and it can be used in guyed, self-supporting, and bracketed tower configurations.