The Vollrath 1522-31 Traex® Bus Box Cover is designed to fit 1521 and 1527 bus boxes, measuring 20"W x 15"D. Made from high-density polyethylene, this cover is both freezer and dishwasher safe, ensuring durability and ease of cleaning. Its gray color provides a professional appearance, and it is NSF certified for safety and sanitation. Proudly made in the USA, this bus box cover is an essential accessory for efficient food service operations.