I recently tested a set of non marking polyurethane casters from the Material Handling section of Industrial and Scientific products. As a result of my tests, I determined that these casters were reliable and long-lasting, able to withstand daily use in an industrial setting .They were also easy to maneuver due to their smooth rolling motion. The only downside was their limited load capacity. Overall, I highly recommend these casters for their efficiency and durability in any workplace..