Solidoodle Fan Mount and Duct - 40mm x 20mm

Full credit to Ian Johnson for designing the originals.

The mount is a remix by Lawsy.

Full instructions and the original design can be found here.
http://www.thingiverse.com/thing:30828

This mount is for 40x20 mm fans. The original mount from Ian used a thinner 40x10 mm fan.