Our single-sided or double-sided Economy Outdoor Changeable Readerboards provide a vibrant, clear, and informative message for a low cost! The available illuminated Top Header stands over 9" tall allowing for large single or two line copy. The top hinged door holds a crystal clear 3/16" lexan window. Tamper-proof locks on each side of the sign prevent vandalism and controls access to the posting surface. Extruded PVC Clear copyboard track is mounted to a 1/8" White acrylic background. Five lines of 4" letters are standard. 300 4" standard letters and numbers included per set. Sign is easily mounted in brick, stone and concrete or with sturdy aluminum post set (sold separately).