D-Link xStack, Serial ATA, 33.1 lbs (15 kg), Rack (3U) D-Link xStack. Storage drive interface: Serial ATA. Chassis type: Rack (3U). Number of storage drives supported: 16. Width: 17.6" (446 mm), Depth: 18.5" (471 mm), Height: 5.16" (131 mm), Weight: 33.1 lbs (15 kg)