SimmerMat Heat Diffuser - Flame Diffuser Stove Cover Ring - Fire Diffuser for Any Type of Electric or Gas Stove - Dishwasher Safe Stove Top Cover - Steel Plates for Simmering and Slow Cooking - Was purchased for my mom and she didn’t use it This is a very useful item in the kitchen. Brand new the 2 pack is $45 From the Manufacturer: About this item EFFECTIVE SIMMER RING HEAT DIFFUSER: Our stovetop cover is utilized in conjunction with low heat settings to provide perfect heat control for slow cooking without the worry and frustration of ruining your culinary creations. Our flame tamer is ideal for soups and casseroles, rice and oatmeal, milk desserts and sauces, chutney, and melting chocolate and toffee. FOR AN EVEN COOK: Our simmering and warming plate effectively and effortlessly eliminates hot spots so that your food will not stick, scorch, or burn. Achieve cooking and simmering perfection with our heating plate. EASY TO CLEAN: Our cooking stove heat diffuser plate is expertly made of safe, high-quality zero carbon steel that is dishwasher safe to provide you with the convenience of easy cleaning, making it the perfect plate diffuser for all your cooking needs. ULTRA VERSATILE: Our stove top covers can be used on all sorts of cooking surfaces including electric coil, gas burner, glass cook tops, induction cooktops, halogen, barbeque, and marine stoves. They truly are the ultimate plate burners for cooking.