Features: -Includes master commercial lock with 2 keys. -Units include a fully integrated flanged collar which fits over the rough opening. -Fits into a rough opening and are secured with mounting hardware (not included) through the back or side panels. -Doors and trim are striated to resist scratching. -Ideal for colleges, schools, private postal centers, corporate mail centers, military bases, government agencies and many other applications. -ISO 9001: 2008 certified company. Primary Material: -Aluminum. Dimensions: -Rough opening for recessed mounted vertical mailboxes is 1.5" less than the unit's width, 1.25" less than the unit's height and equal to the unit's depth. -Individual compartment: 16.25" H x 5.5" W x 6.75" D. Overall Height - Top to Bottom: -19". Overall Width - Side to Side: -24.25". Overall Depth - Front to Back: -7.5". Overall Product Weight: -30 lbs.