This Wear-Ever closed bead natural perforated sheet pan is made of impact-resistant 18-guage heavy-duty 3000 series aluminum. Tapered design for easy stacking. Sized to fit standard baker"s racks. Closed bead includes galvanized non-rusting rod for reinforcements. Concave bottoms flatten during heating for even heat distribution. Coated with non-stick coating for easy food release and cleaning. Perforated pans for oven broiling and baking. Available in 1/2-size. Measures 18-inch length by 13-inch width by 1-inch height.