DIMENSIONS: * Posts: 1" diameter * Casters: 5 x 1 1/4" * Casters add 5 3/4" to the height of the unit.CASTERS: * Not included with shelving. (H-1205WH- Set of 4 casters) For individual casters, use H-1205WH-1.TEMPERATURE RANGE: -20 to 120 FMATERIAL: (Shelving) * Chrome-Plated carbon steel. * Resists rust and corrosion. * NSF certified (National Sanitary Foundation). Casters are also NSF certified.CONSTRUCTION: * Upright posts: Single piece construction.CAPACITY: (Shelving) * Shelf capacity listed is the capacity for each shelf without casters. * Total Starter Unit Capacity: 4,800 lbs * Total Add-on Unit Capacity: 3,000 lbs