Heiwa Freiz "Iiwa Yakiimo Donabe RB-2089" I purchased this last year and used it once. It has been stored in my kitchen for a long time, so I am now selling it. The purchase price was around 4000 yen. I have stored it using the original packaging from when I bought it, so I will send it as is, including the outer packaging bag. It is compatible with both gas stoves and microwave ovens, allowing you to easily make stone-baked style sweet potatoes at home. It comes with ceramic balls that evenly distribute heat, and can be used for corn and potatoes in addition to sweet potatoes. The product size is approximately width 25.5 x depth 21.5 x height 12.5 cm, and the weight is approximately 1600g. The ceramic balls can be used repeatedly. The following is from the product package: Enjoy the season's best with your daily meals. Includes ceramic balls that heat up in the microwave. Deliciously baked in a stone-baked style with gas stove & microwave. Iiwa Yakiimo Donabe Comfortable cooking in winter with a gas stove, and in summer with a microwave! Commitment to ease of use This is a yakiimo donabe that can be made deliciously on both gas stoves and in microwave ovens. The ceramic balls evenly distribute heat, allowing you to enjoy the deliciousness of stone-baked style. The ceramic balls can be used repeatedly. The ceramic balls are made with a special material that generates heat with microwaves. Cooking continues with residual heat even after microwave heating is finished. Recommended for "corn" and "potatoes" in addition to sweet potatoes.