The heat diffuser is made of steel,durable and rustproof, and it is suitable for stove, electric stove, induction stove etc. The hob heat diffuser can distributes the heat evenly across the pan or pot, improves cooking taste of the food. This heat diffuser can be used with cast iron enamel ware, copper pot, coffee pot, stainless steel pot, aluminum pot and ceramic pot etc. Energy saving, this heat diffuser contribute to help you cook more with less energy and heat. Convenience of use and quality that gives you the certainty of many years of use during cooking.Note: do not put it on the oven; Heat the before putting the pan or pot on it. Size Chart: 20: 20cm/7.87 inch 22: 22cm/8.66 inch 24: 24cm/9.45 inch Package Includes: 1 Piece Induction Hob Adapter Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping