RXR Traffic Sign, Height 12 in, Width 12 in, Sign Material Aluminum, Sign Mounting Style Mounting Holes, Printed Language No Text, Sign Shape Circle This Lyle brand traffic sign is designed with Diamond Grade(TM) reflective aluminum material to help keep it highly visible to passing motorists. The full cube prismatic construction material returns about 60% of the available light to drivers or almost double the amount of HIP reflective sheeting. Meets MUTCD standards.