Questions and Answers for Grill Master Cooking Grid Set, Stainless Steel | 17-3/8" x 26-1/4"

These are solid stainless steel. You can wash them in the dishwasher, but it might not be the best way to actually clean them. Remember that the heat of the grill will disinfect the grids, so a good grid brush should be enough to keep them relatively clean. You can try something like barkeeper's friend to scrub off stains if they bother you.