The bed floor is 1/8-inch PNO plate. PNO means pickled and oiled. Hot rolled plate has a brownish black scaling on it, so they put it through a process called PNO. This removes the scale. If you paint plate with the scale on it the paint will just flake off. The floor is very thick, which keeps it flat and rigid. Stock bed floors are corrugated and the shape gives it it's firm structure. The sides and fenders are 16 guage. This is still pretty thick, but I want to keep the long flat shapes from warping. The final look will include paint and chrome.