Printrbot 1405 improved fan shroud

Edit (8/19/2015): A new fan shroud design located here(http://www.thingiverse.com/thing:974421). This new version is a dual nozzle design which has less flow restriction and also allows a 40x20mm fan to be mounted.
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This is an improved fan shroud for the Printrbot simple 1405. It is modeled after this printrbot metal fan shroud (http://www.thingiverse.com/thing:356001). Designed to keep airflow off the hotend.