The gold loaf pan with Non-stick coating is made of safe aluminium alloy for food.External Size: 8.38 x 4.8 x 4.5inch Interior size:About 7.5x4x4.4inch Weight: 1.0lbsThe hole of the bottom is for good air circulation to improve the performance of the pullman loaf pan.You can make toasted bread at home and it is a perfect gift for bread lover