Cortina Roof Warning Line Vinyl Pennant, 105' Long, includes 42 Yellow 12" x 18" flags per strand. Cortina OSHA Compliant Pennants can be used for a variety of applications, however these pennants with their reinforced strands are the only approved pennants for use with the 03-765 & 03-765RBC Roof Warning Line Perimeter. The warning line shall be staged and supported in such a way that it is no less than 34 inches from the walking/working surface at its lowest point and no more than 39 inches at its highest point. Tensile strength 500 lbs.