Primo has always been at the pinnacle of innovation and diligently trying to make your Primo Grill, better. The Primo 13-inch natural finish ceramic baking stone (350) allows you to make authentic wood-?fired pizza, bake bread, casseroles, and pies. The baking stone offers a baking surface with even heating. natural finished sides help absorb moisture from baking foods like pizza dough - perfect for pizza, bread, cookies and much more. With the Primo 13-inch natural finish ceramic baking stone (350), your possibilities are endless. Fits all Primo sizes.