This bezel is for the NLPWM Smart PWM board developed by Mark Mathis whitch can be purchased at voltrove.com
you will need to cut a 20mm X 84mm hole for the bezel, there is 2mm of overhang on each side.
Link for screws: http://www.protovapor.com/product/0-self-tapping-screws/
I used very small screw holes so the bezel can accomodate several screw sizes, just drill for the screw you choose.