The Rational 60.21.289 is a mobile oven rack designed for efficient organization and accessibility in commercial kitchens. This roll-in rack accommodates up to 17 half-size pans measuring 12" x 20", making it ideal for high-volume cooking environments. With a spacing of 2-7/2" between each shelf, it allows for optimal air circulation and even cooking. Please note that grid shelves are sold separately, providing flexibility to customize your setup according to your needs. This durable and practical oven rack enhances workflow and maximizes space in your kitchen.