The CLS Collection features an extra sturdy and optimally adjusted, fixed height chrome footring. In addition to that, versatile dual-colored 65mm soft casters, and simple-to-use adjustments really make stools from this series the worry-free answers to lab and counter-height environments. Additionally, stools from this series feature standard spring-loaded seat sliders and EZ back height adjustments to make the convenience of using these chairs, matched only by their tremendous value! Classic Lab Stools Collection Includes: CLS53, CLS57, CLS61, etc.