Pizza Oven Kit. Transform your Weber style Kettle Grill into a Deluxe Wood Burning Pizza Oven. This Kit is designed for 18.5 inch and 22.5 inch Charcoal or Wood Burning Kettle Grills and Smokers. The round sleeve is constructed of rugged 20 gauge, 304 grade stainless steel, so, it will last for years to come. Prep your pizza anyway you like it and slide it in the entry window.