[0.5MM Carbon Steel Non-Stick Bread Pan]: loaf pans are manufactured with heavy, reliable, food-rated gauge carbon steel. Food-grade coating, non-Teflon release in high temperature , PTFE & PFOA FREE, so you can focus on getting delicious things cooking [Bottom Exhaust Holes Design]:It had three holes in the bottom, the bottom vent design allows the dough to be heated more evenly and has a richer taste. Note: When you need to bake with batter, you need to add a piece of parchment. [Two Uses for One Loaf Pan]: This pullman loaf pan cover can not only bake square bread, but also make bread toast. According to your preference, you can choose whether to use the cover . Intimate design realizes two uses of one pulman bread pan. [Standard Size and Easy to Clean ]External Size: About8.38 x 4.8 x 4.5inch Interior size: About 7.5x4x4.4inch After washing , dry the bread pan in the oven, make sure the corners retain water is dried completely in the oven.