Shelves are uber-adjustable: height, slope, lip or flush edge. Available with either 2 or 3 adjustable 14 gauge shelves which can be bolted in place with their 1-1/2" lip edges facing either up or down. Shelves can be level, or positioned with a 7 or 15 degree slope. Bottom shelf is fixed with a 1-1/2" retaining lip. Shelf heights are adjustable in 2-1/4" increments on the 48" tall shelf supports. 2 swivel and 2 rigid casters have 6" x 2" non-marking polyurethane wheels.