Description : ADC3660 Enclosed Aluminum Frame Directory Board Satin Anodized Finish are made of custom extruded parts engineered to provide accurate durable and handsome Cabinet. All corners are neatly mitered and assembled with heavy duty reinforcements and fasteners. Lockable doors are mounted with a full length piano hinge and feature acrylic safety glass windows. The fixed rear panel is a felt cover letter board designed to accommodate changeable letters with tabs spaced on 1/4 centers. Concealed mounting brackets are provided.