3MTM Diamond GradeTM DG3 Reflective Sheeting Series 4000 is a brighter, more reflective sheeting for traffic signs that offers better visibility and more time to react. Using 100% active full-cube microprismatic technology, these reflective road signs surpass the ASTM Type XI requirement, helping to make roads safer and easier to navigate. The highly efficient reflective optics return light to drivers at varying angles for maximum legibility. Whether the driver is in a semi-truck or low-to-the-ground sports car, signs remain clearly visible regardless of sign placement or time of day.