Adult Extra Large Cuff: Our blood pressure monitor cuff suit adult big 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 brands 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 Cuff4 mm connector5 mm connector6 mm connector7 mm connector11.3 mm connectorQuick User Guide Replacement tips: If the size of the connector does not match, and the connector is removable, you can replace it with the original connector, Precautions-The cuff is not placed in the correct position, which may affect the accuracy of the measurement(*Not include a blood pressure monitor)