Satin anodized aluminum frames. Shatter-resistant acrylic windows. Lockable door(s) mounted on full length piano hinges (2 keys included). Case dimensions: 1" wide main frame; 1-7/16" wide door frame; 2" exterior depth, 5/8" interior depth. 3/4" Helvetica letter and number set is included. Indoor Models feature Black or colored felt letter board. Outdoor Models feature Black or colored vinyl letter board with weather-resistant backing. Both models also available illuminated and with lighted headers. Other sizes also available. Call for pricing.