48" Aluminum A-Frame Sidewalk Sign - Corex Panels! 24"x 48" 2-Sided Anodized Aluminum A-Frame Sidewalk Signs. Anodized Aluminum Resists Oxidation & UV Treated, Very Weather Resistant. Comes With One 24"x48" Anodized Aluminum Frame & Two 24"x44" White Corex Corrugated Poly Panel Inserts! You can fill the leg cavity with sand & double it's weight!? Removable & Interchangeable Panels! Add posters, letter tracks or any other panels in the future without buying a whole new frame!