Independently adjustable height legs may be set to level unit on uneven floors. Ergonomic matting on top surface provides a comfortable standing surface. Each leg is fitted with spring-loaded swivel caster with a protective steel caster cup with rubber bottom ring. All welded steel construction with baked in powder-coated finish for added toughness. Uniform capacity is 500 lb each. Complies with OSHA 1910.26 specifications.