Replacement Tips - If the connector size doesn't match, and the connector is detachable, you can replace it with the original connector. Durable Material - The extra-large blood pressure cuff uses nylon cuff fabric and a TPU airbag that is non-toxic and odorless. The nylon soft hook Velcro will not snag your head. After-Sales Service - We offer a 1-year warranty on the extra-large blood pressure cuff, with free refunds and replacements. If you have any quality concerns or other issues, please feel free to contact us via email. Compatible Design - The blood pressure cuff comes with 7 connectors on the upper arm. The replacement XXXL cuff is suitable for most brands of blood pressure monitors. Adjustable Cuff - The blood pressure monitor cuff fits adult arms with a circumference of 9-21.2 (22-53 cm). The replacement cuff can be easily calibrated independently for improved accuracy. Package Includes - XXXL Blood Pressure Cuff, 4mm Connector, 4.6mm Connector, 5mm Connector, 6mm Connector, 7mm Connector, 7.2mm Connector, 11.3mm Connector, Quick Guide Manual