Product Detail Best used with a 12x10 MotherBoard Drive Bracket: Ext 5.25" x 4 + Ext 3.5" x 1 + Int 3.5" x 2 HDD Trays One cooling fan and air-filter in front and 2 x 80mm cooling fans on the back Lockable front door to secure networking environment SupportStandard ATX, PS/2 Power Supply . The "4U ICX-4880B-20 Rackmount Rack Mount Chassis Case" is best product for you. We recommended 4U ICX-4880B-20 Rackmount Rack Mount Chassis Case