This cabinet is made of particle board, but it's quite sturdy. Very well finished and the speaker sounds ok. If you're going to replace the original speaker with another one, keep in mind that the original is attached with six screws and most other speakers won't fit straight away, you'll need to drill new holes.
Bought one a while ago for a Kustom Defender 5H head (also highly recommended). Great sound and very well made, in fact bulletproof build quality. Unfortunately not fire-proof though as a recent house fire proved to me! However, I will be buying another one as soon as the insurance company pay up.