18" Windstorm Banner Bracket Kit (2 Sided) Boulevard Brackets: Designed to hold up in the wind and the rain. The bracket is made from cast aluminum that will not rust and the arms are made with fiberglass. The fiberglass arms will flex in severe winds protecting the banner from taking all of the wind load. The universal bracket design will fit square, round, or multi-sided poles. The fiberglass arms have a 3/4"outside diameter. This kit contains: " x4 Cast Aluminum Brackets " x4 18" fiberglass arms " x4 end caps " x4 Cable Ties " x4 Pins and rings " x4 47" Stainless Steel Straps