New star foodservice 38422 commercial-grade 18-gauge aluminum sheet pan/bun pan & silicone baking mat set, 9" l x 13" w x 1" h (quarter size) 4 quality- commercial grade, 18-gauge bakeware is made of pure aluminum which will never rust for a lifetime of durability. Durability- wire reinforced beaded rim helps prevent warping. Baked goods rise and bake evenly due to aluminum's superior heat conductivity. Multi use- more than a sheet pan, use for your cinnamon rolls, sticky buns, yeast rolls, brownies, corn bread, cookies and fruit cobblers.