New:

Part # GK 4-6  BLUE Color

Aluminum Project box, Enclosure 2" X 4" X 6" long Blue Color

Extrusion fetures:

*Outside Dimensions: 2" X 4"

 *Inside Dimensions: 1.75" X 3.75" X 6"

*1/8" thick with 0.070" groves (verical and horizantal) for PC boards

*comes with front and back panels with screws

* black anodizes

* standard lengths are 5", 6",7", 8"

* 36" long extrusions are also avaliable (not anadized) 

For more info see link:

http://gkphotonics.com/ee.html