Adult Large Cuff- Our blood pressure monitor cuff suit adult arm 9-21 inches (22-53 cm) in circumference. The replacement cuff is easy to self-adjust to improve accuracy. Compatibility Design- The Replacement Extra Large Cuff is suitable for most s blood pressure monitor. Easy installation and adjustable. Material - Blood pressure arm cuff using nylon cuff fabric, TPU airbag non-toxic and tasteless. Nylon soft hook Velcro does not grab the hair. Package Including - Extra Large Replacement Cuff4mm connector5mm connector6mm connector7mm connector11.3mm connectorQuick User Guide. Notice& - Not include a blood pressure monitor. Money-back satisfaction guarantee if you have any quality concerns or other problems, pls feel free to via , we will solve your problem in 24 hours.