The MiniBox 34 family of enclosures from Elma comes in desktop or wall-mount styles. Grooves on the inside of the top, bottom, and sidewalls of the enclosure allow PCBs to be directly inserted in various heights inside the enclosure. 

An optional vertical divider plate has grooves on both sides allowing PCBs to be inserted on each side of the enclosure.

The plate can be inserted in the middle of the enclosure or in various spots allowing PCBs of different widths to be plugged without special hardware mounting.

EMC design is standard with advanced shielding options available.  Protection to IP40 is also standard with options to IP65 for dust and water resistance.
 
For more information, see http://www.elma.com