This adult aneroid sphygmomanometer is precision-crafted and exceeds industry standards. The nylon cuff includes a clear and visible marking system to ensure correct application. The McKesson sphygmomanometer valves has filter screens to prevent dust development. The air-release valve acts quickly to rapidly deflate the cuff. The circumference range is 9 to 15-7/10 inches. It's suitable for small adults and children. . WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov