Smartsign U6-1278-RD_7X5"WARNING WHEEL CHOCKS MUST BE USED ON ALL TRUCKS DURING LOADING AND UNLOADING OPERATIONS AT OUR DOCK" Reflective Self-Adhesive Decal, 7" x 5" Lyle Signs supplies your decal with pressure-sensitive adhesive for easy application Lyle Safety decals meet OSHA 1910.145 requirements This Lyle Safety decal uses reflective sheeting for night-time visibility