Granite Ware Better Browning Muffin Pan, 13-inch by 9-inch Granite Ware Better Browning series is Made in USA Carbon Steel core is more energy efficient and safer Porcelain enamel surface is an inert, non-porous and naturally non-stick surface No PFOA, PTFE or other harmful chemicals and are dishwasher safe Size 13 in x 9 in x 1.5 in Carbon steel core provides excellent heat distribution Naturally non-stick porcelain enamel surface No PTFE, PFOA or harsh metals are used Dishwasher and metal utensil safe 13-Inch by 9-Inch by 1/2-Inch