This state-of-the-art system is designed to withstand the elements. The base is made of rust-free cast aluminum with fiberglass arms.The fiberglass arms flex in strong winds transferring some of the wind load off the banner sign. Stainless steel bands make installation easy. Also available in 24", 30", and 36" widths as well as double bracket models. Maximum banner size recommended is 24 square feet. The unique base will fit square, round, or multi-sided sign poles.