Vestil ROL Foldable Roller Containers, models ROL-1834-3, ROL-3143-2, & ROL-3143-1 are designed to deliver convenient portability between work stations or for delivery and distribution of products & materials. Units fold flat for quick and easy storage. Folding containers roll easily on 5" x 1¼" casters, two rigid and two swivel with brake. To calculate individual shelf capacity, divide the number of shelves by the total capacity. Vestil ROL foldable containers feature all welded steel construction with blue enamel finish.