.125" Aluminum panel that utilize 3M's DG3 or equivalent sheeting to enhance visibility, typically of traffic control signposts. Four (4) .375" holes per marker enhance rigidity and improve performance when subject to damage from lawncare, hazardous conditions or vandalism. Various widths to conform to the various signpost configurations. Standard colors: Red, Florescent Yellow and Florescent Yellow Green. 60" in length.