Material: Enamel Dimensions: 4 3/4" x 4 3/4" x 1 1/5" - 100% food safe and great for cooking - 100% recyclable, natural raw materials with non-toxic paints - Each product is handcrafted by artisans - Dishwasher safe - Oven, gas, electric and induction stovetop safe. - Freezer safe. - Do not microwave! It is made of steel. - Enameled iron is incredibly strong, but the porcelain topcoat will chip if handled too roughly or dropped onto hard surfaces — revealing the metal frame underneath. When this happens the steel below naturally oxidizes and the enamelware remains safe to use.