Half-Sheet Pan 18 inch by 13 inch Heavy gauge aluminum. These professional baking pans (sheet pans) are a staple for every baker. Reinforced with a heavy all aluminum wire in the rim, these sheet pans will never rust, flake, chip, or peel. Our exclusive Dura-Kote coating (DK) minimizes cleanup, often eliminates parchment paper or sprays, and improves your baking times. The coating is non-toxic, manufactured without PFAS and has no petrochemicals.