The Winco ALZK-20BK is a durable and reliable 20-Tier Nesting Sheet Pan Rack that boasts a 650-pound capacity and includes full-swivel casters for easy maneuvering. The Z-frame nesting design is ideal for space saving and its 3" spacing between each tier allows stacking of full-size (18" x 26") and half-size pans. Ships knocked down. Fully assembled, the rack is 22"L x 27-1/2"W x 70"H.