Brand new, Skar Audio dual 12, shallow subwoofer box for 07-14 Chevy Ext Cab. Took it out of the box. Set it in the truck. Looked at box. Seen Extended Cab. I have a crew cab. Put it back in the box. Specifics in pictures, on box. For the 2 minutes I looked at it, it is pretty well built. Look it up online.