Vollrath (3910C) 9-1/2" Optio Cover Optio cover is designed to fit pan models 3809 and N3809 fry pans, 3804 saut pan, 3806 sauce pan, 3503 stock pot, 3902 sauce pot Made of stainless steel material Cover ensures that the contents of the pan do not lose moisture while cooking It reduce the risk of pitting and discoloration that can ruin the effectiveness of the pan Cover measures 9-1/2-inch diameter