Black Acer X3910 Mini Tower Desktop PC Case With Front I/O Ports and some internal cabling as shown. 

This is a small case so requires a slimline power supply such as a LiteOn PE-5221-08 and a small motherboard- a standard MicroATX board with 4 expansion slots will be too big.

Approx dimensions:

27cm High 

10cm Wide 

37cm Deep