Dolly Truck, 4-tier, 48"W x 21"D wire shelves with patented QuadTruss® design, 63"H posts, EAGLEbrite® zinc finish, 52-7/8" x 26-3/4" aluminum truck dolly with wrap around bumper, (2) swivel & (2) swivel/brake 5" casters with resilient tread, KD, NSF