Air-tight door seals and air-intakes for fan filter out dirt and dust preventing it from entering system. All welded steel and completely secured. Piano hinges on all doors. Four 5” casters, 2 locking. Powder coat finish. Monitor section: 25-1/2”W x 30”D x 21-1/2”H Work height: 44-1/2” Slide out keyboard tray: 24-1/2”W x 24-1/2”D Lower cabinet: 25-1/2”W x 30”D x 33-1/2”H with adjustable pull-out printer shelf