This is a guard for the print head cooling fans on the Monoprice Maker Select V2, modeled in Autodesk Inventor Professional 2016. Theoretically, this piece should also work for the Wanhao Duplicator i3/Cocoon Create. I don't have either of those printers, though, so I can't say for sure that the fans are the same.
It push-fits directly into the two unused screw holes on each fan. For the guards to fit with the out-of-the-box screw arrangement, you need one of each guard.
Note: it does make the fans a bit louder due to slightly restricting the airflow, but the noise increase isn't significant compared to how loud the printer is anyway.
Monoprice Maker Select V2