Amco Half Size Sheet Pan is manufactured to meet the exacting standards of the toughest commercial bakeries and food service establishments. Each pan is crafted from heavy-gauge aluminized steel, a 3-ply material consisting of two layers of tough corrosion-resistant 18-guage 3003 aluminum alloy around the durability, strength and superior heat conduction of carbon steel. The frame is supported by a thick, coated reinforcing wire to give the pan additional strength and insure greater durability. Bottom of pan is concave and will flatten during heating for even distribution. Natural finish.