Ergonomic 20 Bed Height. Less bending means easier loading and unloading, and keeps material closer to most machine heights. Highly maneuverable-four swivel casters with 6 hard tread phenolic wheels allow movement in any direction. Useful in tight work areas with long loads and when moving around corners. 3000 lbs. Capacity Each. Use for both transport and storage. Combine multiple units for greater capacity and to support longer loads. Loads on single units must be centered on truck.