You are looking at a Rear Deck Speaker Panel for the NA Miata made by Clearwater Audio. (May also fit the NB, not sure. May require some massaging to fit). These are no longer made and very difficult to find. This is a new unused piece. Has never been installed in a car. If memory serves me correct, this was the last one Clearwater had in stock when I inquired about it and was fortunate enough to pick it up. The piece is made entirely of fibreglass and is very light. Speaker holes are about 6.25" in diameter. With a little work, you may be able to get a 6.5" speaker in there. Cash only, you pick up. Please see my other items for sale. Thanks for looking. ***If contacting me by email, please include your phone number so I can call/text you, or check your Email Spam Folder. I reply quickly, but it seems my emails may be going to interested parties spam folder. Thanks