Bbox S-10G 10" Universal Chrome Subwoofer Grill, Pair

What are the exact inside and outside dimensions of the outer flange (eg, as if it were a full ring)? Should be 9ish and 10ish, but need exact. Thanks

Will this fit on JL 10 w7????

Does it come with screws?

Do these fit over the atrend dual 10 box with w3s