12 gauge shelves handle the heaviest of loads. Three (3) shelves with lips down (flush). Phenolic hard tread casters (6 in. x 2 in.) - 2 swivel and 2 rigid - for added maneuverability under heavy loads. Swivel casters have wheel brakes to stop unwanted movement when loading and unloading. 36 in. overall height. Shelf clearance is 12 in.