I'm quoting from the internet. [Product Information] This is the dancyu cooking utensil series, which makes the most of the quality of cooking tools used by professionals, while also being designed for easy use in the home. It is a pure copper omelet pan with a thickness of 1.2mm. It becomes easier to use the more you use it as the oil becomes familiar. It comes with a wooden lid, which is useful for placing freshly made omelets directly on it after flipping the pan, or for shaping them. Because it is made of copper, heat is transmitted softly and evenly, resulting in fewer unevenly cooked spots and less burning, and it maintains the right temperature, so the omelets are fluffy. The square design, which is not commonly seen, is also visually appealing. Size: Approximately height 4cm (excluding lid) x width 18cm x depth 18cm (excluding handle), thickness approximately 1.2mm, weight approximately 900g Material: Body: Copper, Handle/Lid: Natural wood Country of origin: Japan Notes: For gas stoves only It has been used a few times, but the pan itself is still before the copper has been fully seasoned. The brand is dancyu, but the manufacturer is unknown. Thank you.