This stovetop heat diffuser, also known as a simmer ring, is designed to distribute heat evenly from gas and electric hobs, preventing liquids from boiling over and protecting pans from scorching, burning, or overheating. It is ideal for recipes requiring gentle, even cooking, such as sauces, custards, or heating milk. The diffuser helps increase the longevity of cookware and reduces cleanup by minimizing burnt-on food and boil-overs. It measures 18 cm (7 inches) in width and comes with a 12-month guarantee.