• Bases are built with fully welded 7/8" heavy steel tubing and are guaranteed for life against breakage • Casters feature our patented 5" Clean Wheel System™ with non-marking polyurethane tires. They reduce debris pick up in hubs. The ball bearing design gives years of service • New bearing raceway guards shield top caster bearings from dirt and chemicals • New larger, softer non-marking bumpers help protect equipment and walls from damage • Chrome plating is sturdy, bright and commercial quality - saves maintenance • Colored bases and racks are powder coated in a durable duraguard finish coating