Exhaust fitting for 3D printer enclosure

This is an exhaust fitting I developed for my Lulzbot Taz 4 or 5 printer enclosure, but it could be used for any kind of exhaust needs. (see thing: http://www.thingiverse.com/thing:746922) It is designed to mount to a 50x50mm dc fan, and screw into 2.5" exhaust hose from McMaster-Carr: http://www.mcmaster.com/#5398k12/=wjk94g

This fitting threads into the non-flared end of the hose, and provides mounting to the fan and enclosure outlet port.

***Update 12-6-2015*** Check out the wall mount version of this: http://www.thingiverse.com/thing:1178146