Available with offset casters to move easier over thresholdsFrames are made from 18-gauge steel with 1" square tubing; shelves are 20-gauge steel. Six welded beams in lower frame provide strength. Features extended curved handles for comfort and easy use. Silencer mats under every shelf provide "library quiet" performance.Includes 2 tiers of 6 3/4"D sloped shelves on both sides, and a top 16"D flat shelf. Clearance between shelves is 12".Ball bearing 5" swivel casters available as 2 rigid and 4 offset center wheels that allow pivot and rocking motions (part number 6585), or 6 swivel casters with no offset mechanism (part number 6585-6S).Rubber bumpers at the bottom of the frame prevent accidental damage to furniture.Finished in platinum baked enamel over mar-resistant textured steel for exceptional durability.Ships via Truck. FOB: ILOverall dimensions: 42H x 37W x 16"D