3M Diamond Grade 4000 Series . Prismatic reflective sheeting. Uses full corner cube optics to reflect more light back to the driver . This provides outstanding reflectivity at every viewing angle, distance and weather and light conditions. DG 3 satisfies or surpasses the minimum luminance index for all classes including RA2,3A and 3B. Designed for durable road traffic signs , including gantries, motorways and trunk road signs. DG3 is the only premium sheeting that carries the CE quality marking. Red (4092) and Yellow (4091) sold as standard colours.