Maxtop ICX-4830B-20 4U Rackmount Server Computer Chassis Standard: 19-inch EIA (Electronic Industries Association) Form Factor: 4U chassis support for max motherboard size 12" x 10" Drive Bays: 3 x 5.25" open, 1 x 3.5" open, 7 x 3.5" HDD internal bay Cooling System: 1 x 120mm front fans + 4 x 80mm Dimensions: 19" x 7" x 18.5" (WxHxD)