1 Mack Truck License Plate Holder w/ 2 Mack Light Cutouts - 304 ? Stainless Steel. It is slightly magnetic but I do believe it is stainless steel. It is bent and dented and I'm not sure if the bend or any part of it was original. It is not new and show signs of use and age. The hinge does move but there is some grit inside of it. Please use the pictures to help determine the condition of this item. I am selling this item as is. I do not know if the Mac cut outs are for lights or not and that is what? Is for.