Ooni Karu Pizza Oven. Fueled by real wood or charcoal, cook authentic wood-fired, stone-baked pizza in any outdoor space in just 60 seconds. Stainless steel body is ceramic fiber-insulated, with an extra-thick cordierite stone baking boardand patented flame keeper for maximum heat retention. 13 in. cooking surface and custom designed fuel tray that maximizes airflow and delivers a powerful blast of searing flame. Load it up with real wood or charcoal, with no excess ash to clean.