These tote racks are NSF-certified. The aluminum construction will not rust. These tote racks are 27 x 20 x 51 (L x W x H) and can hold four 25 x 16 x 8 1/2 (L x W x D) lugs. The 5" dia. heavy-duty swivel casters make it easy to transport larger amounts of food at one time. These tote racks have a five year limited guarantee.