Use a Ooni Pizza Stone 15mm - Karu 12, Karu 12G to refresh the baking stone included with an Ooni Karu 12 or Karu 12G Pizza Oven, or to upgrade the quality of pizza created in a home oven, as these high quality 15mm cordierite baking stones are resilient, plus optimise the retention of the heat to cook a fantastic pizza base for tasty pizza whenever the oven is fired up or turned on