Choose ADP's deluxe line of directory board cabinets to display and inform. Our tempered glass doors with locks prevent tampering and vandalism. Announce meetings, events, locations, or rates. The black 1/4" grooved back panel enhances white plastic letters. The case is framed with 1-3/4”W x 3”D heavy-gauge anodized aluminum tubing. Internal depth is 2". Cabinets are available with sliding glass doors to maximize visibility or hinged doors with pinch-proof, full-length piano hinges.