This 36"x36" UTILTY WORK AHEAD, vinyl traffic sign by Dicke is a roll up, non-reflective and offers full size signage that makes lightweight, easy storage. Fiberglass ribs (cross bracing) feature a protective veil to prevent blooming and painful splinters. Rib set is fastened at the center with a 1/4" steel rivet and spring washer providing constant tension; will not loosen or tighten with use the way nut and bolt assemblies do. Corner pockets are made of tough polycarbonate plastic for durability. Back to back hook and loop strap for storage. NCHRP-350 compliant when used with NCHRP-350 compliant stands (sold separately). F.O.B. Downers Grove, IL 60515.