Anybody know the dimensions for the top plastic window on the Suppressor F1?

[whum]

I would like to perhaps buy this, but I am having a hard time finding dimensions of this specific window, as I would like to ~ possibly ~ swap it out with a grated opening with dust filter. I'm not as handy as a lot of you seem to be, and I'm still very new to all of this, so I was wondering if anybody who has been down this rabbit hole before, knows the specs? Thanks either way.