Using the Extender Ring can increase your NuWave Oven Pro Plus's capacity by up to 50%. Without the Extender Ring, your oven can cook up to a 10-pound turkey. With the Extender Ring, the capacity is increased so that you can fit up to a 16-pound turkey or even a 14-pound ham! The 3-inch stainless steel ring also helps to increase the distance between the heating element and your food, ensuring you don't accidentally overbrown your food. The Extender Ring is a must have for larger families because of the amount of options it opens up for you.