Norco RPC-430 Rackmount Chassis is a 4U case with a depth of only 15-1/4”. It is designed to accept Micro-ATX, ATX, CEB, and EEB style motherboards. The RPC-430, and RPC-330 (the 2U version of the RPC-430) are perfect for home theatre, mobile DJ station, even individuals like musical professionals, and of course, rackmount that require compact space in small business or home office use. They are both Super Short Depth 15.25&Prime. These give the customer a good option of choosing 2U or 4U depending on the situation of space and flexibility. You can easily put either one in you home theatre and record or download you favorite movies, music and play directly from it, without the hassle of burning them in to DVD or CD.