DIMENSIONS: * Posts: 1" diameter, Single piece construction. * Casters: 5 x 1 1/4" * Casters add 5 3/4" to the height of the unit. * Shelf Thickness: 1 1/4"ADDITIONAL PARTS: * Casters: Not included with shelving.TEMPERATURE RANGE: -20 to 120 FMATERIAL: * Powder coated. * Casters are NSF Certified.CAPACITY: * 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