The Vollrath 1522-C02 Traex Red Color-Mate Recessed Food Storage Box Lid is constructed of rugged polypropylene construction. It can be used on any of Vollrath's color-Mate food storage boxes. The recessed lid design allows boxes to be stacked. Food storage can be easily color coded as follows: red for raw meat, yellow for poultry, blue for seafood, green for produce, white for dairy, and purple for allergen-free. The affordable and sanitary Vollrath 1522-C02 Traex Red Color-Mate Recessed Food Storage Box Lid measures at 15 inches in width by 20 inches in length. It is freezer safe, dishwasher safe, NSF approved. Made in USA.