Replacement Medium Cuff For Compatible Omron Blood Pressure Monitors. This Cuff Is Suitable For Use On Upper Arms With A Circumference Of 22-32 Cm And Is Compatible With The Following Omron Devices; M2 Basic M2 M3 Please Note: This Cuff Is Not Suitable For Use On Comfort Devices Or Devices Which Use Omron's Intelli Wrap Cuff.