The Avenger/Manfrotto Column Arm Bracket consists of two ~24" tension strap fastners, a braced, 20" long arm with a Universal Mount - 1-1/8" receptor on top, a 5/8" baby stud on the bottom. The upright is best suited for molding to the side of a 2- 2-1/4" pipe or truss. It weighs 6.8 lbs. (3 kg)