36x72 3 Door Satin Alum Frame w/ Headliner Enclosed Vinyl Bulletin Board . Enclosed Bulletin Boards: Exhibit your important information and documents for all the world to see without allowing all to touch in an Enclosed Bulletin Board. The lockable hinged doors feature shatter-resistant acrylic to keep your display clean and undisturbed. The natural cork posting surface is self-healing and will withstand repeated tacking. Interior case depth is 1-5/16" for both aluminum and wood units. Specially-engineered aluminum framed models with natural-colored tackable vinyl bulletin boards and weather-resistant backing are available for outdoor use. FREE SHIPPING!