The 4U form factor chassis accepts 14 full-height expansion cards and 12"x9.6" ATX / Micro ATX motherboards. The rackmount chassis provides your server a sturdy structure, reliability and performance. The D-402A-14 series is formed around a group of integration of a single common all steel chassis design. The D-402A-14 Rack Chassis is 17.8 inches of solid performer in its ability to ruggedly house the most demanding applications. The D-402A-14 Enclosure features a lockable front door that secures four front accessible 5.25" drive bays for fixed or removable media as well as optional internal brackets that based on unit configuration can host one external internal 3.5" drive. This is the ideal high capacity, low profile, (only 4U high) system or server enclosure. Single or dual front mounted power supplies on some integration and single unit high capacity power subsystems on other integration.