Stencil, Character Type Message, Duty Light, FAA AC 150/5340-1K Compliant Yes, Included Characters, Messages, and Symbols Hard Hat Area, Includes Hard Hat Area, Individual Character Height Not Applicable, Individual Character Width Not Applicable, Interlocking No, Interlocking Orientation Not Applicable, Material Polyethylene, Message or Symbol Height 24 in, Message or Symbol Width 24 in, MUTCD Compliant No, Number of Pieces 1, Overall Stencil Height 30 in, Overall Stencil Thickness 0.063 in