Omron CD-WR17 is a contoured wide-range arm cuff designed for use with OMRON Advanced Accuracy blood pressure monitors compatible with D-Ring Cuff. It fits arms with a circumference of 9 to 17 inches (22 to 42 cm) and helps you take accurate blood pressure measurements at home. The cuff is easy to use and provides a comfortable fit, making it ideal for regular monitoring of your blood pressure.