PC Enclosure ATX Rack 19 Inch 4U - Simple 19 "rack mount - Height 4U - Front sliding lock - Two 5.25 "external slots, one 3.5" and eight 3.5 " - Two USB 2.0 ports on the front panel - Maximum board size 12 "x 9.6" - Handles for standard ATX PS2 or mini redundant power adapters - Two 8cm fans in the upper panel - Large 12cm fan with front panel filter Two seats for extra 8cm fans on the rear 482 x 177 x 450 mm