This 11″ x 11″ Round Fiberglass Food-Service Tray (Winco TRH-11) is made from fiberglass. The material is ribbed for an “easy hold” feature. This material is heavy duty and light weight. This item is durable and built with longevity in mind. The stain and scratch-resistant material proves that. These items are stackable, and are mainly used in cafeterias, hotel service, hospitals, schools, and universities. When cleaning this item, you can rinse or use the dishwasher, as this item it deemed dishwasher safe.