These handsome directories are over-built in every way to insure lasting durability. The frame is machined of solid, extruded aluminum offered in a variety of contemporary finishes. The message boards are constructed of weatherproof and fade resistant vinyl with integrated slots to offer an attractive background for white plastic letters. Enclosed directories are supplied with a 1/8" thick clear acrylic window which shares the track containing the slotted directory. Custom sizes are available upon request.