The Heat Equalizer Heat Diffuser is a round black heat diffuser made of aluminum and copper, designed for use with gas stoves and electric stoves. It has a 9.25-inch diameter and is perfect for evenly distributing heat and preventing hot spots when cooking on both gas and electric stoves. With its innovative design and high-quality materials, this heat diffuser from Heat Equalizer is a must-have for any kitchen, providing a convenient and efficient way to cook your favorite dishes. Made in the United States, this heat diffuser is a reliable and durable addition to your cookware collection.