Dicke Safety RUNR48-200 Solid Vinyl Roll-Up Sign, "Road Work Ahead", 48" x 48", 1/4" V and 3/16" H Ribs, 4-PocketsDicke non reflective roll up vinyl traffic sign offers full size signage in a lightweight and easy to store design. 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 like nut and bolt assemblies. Corner pockets are made of tough polycarbonate plastic for