this is actually two pieces. Black Lexan 1/8 thick, glued on 1/16thick black acrylic (to give a bit of 3d effect) with a thin layer of brushed aluminum lexan on top. The one who did these for me, says the thin stuff he etches all the time. The laser engraves the aluminum off, leaving only the lexan underneath. (it's not really aluminum, it's like a brushed aluminum llook out of lexan or something.)