Fan Grill

This is a fan grill for the 120mm fan that cools my CR-10 S4 controller box, in it's enclosure.
It's designed to have a 120mm hole cut through 3/4" MDF, then this fits inside that hole.
The mounting holes for the fan and the grill are aligned so that you can use a single bolt and nut at each corner, through the MDF, to hold it all together.

This pairs with a 120mm Cooler Master, Sickle Flow 120 Fan.
http://www.coolermaster.com/cooling/case-fan/sickleflow-120-2000rpm/