It's Titebond II but I mixed some and put it in the interior seams anyway, better be safe than sorry. I put the top on, had some gaps, nothin alot of glue and lots of screws couldn't fix though. When I get my speaker and cut my hole I'll mix some more sawdust and hit the leftover cracks. It's 16" Tall so there won't be much wood between speaker ends. I read 16" is the shortest you can get away with, with very limited back seat room in my truck, I built it the minimum, just made it wider for more airspace. I think it should pound okay.//content.invisioncic.com/y282845/emoticons/thankyou.gif.5451126d09e870f796f50c3a4dd5acd7.gif for all the comments.