This is a small shroud for a fan that replaces the exo-terra monsoon misting head. Screen needs to be siliconed to the outside of the housing to keep animals out of the blades; or not if you're using it to blow solder fumes away. Utilizes a 12V 40mm fan from radioshack and a suction cup mount for the Exo-Terra monsoon unit. I printed the threads on .075mm layer height for good resolution and it threads into the 1/8Straight pipe thread perfectly. Here's a link to the fan: http://www.radioshack.com/product/index.jsp?productId=2102824&CA_6C15C=107609844&utm_source=BZ&utm_campaign=product&utm_medium=CSE