They are plastic, as I also have a control panel (but don't have the bezel). It's a really hard plastic, with the art silk screened on the inside, and curved, so it's very rigid. It has holes on the sides at the end that bolt into wood blocks on the sides underneath the CP, and 2 on the bottom that bolt into the front of the cab. Interestingly, all the ones I've seen have yellow start buttons, but my CP has blue ones. (hey dezbaz, I think I've seen that pic before

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