Replacement Tips - If the connector size does not match, and the connector is removable, you can replace it with the original connector Durable Material - The extra large blood pressure cuff uses nylon cuff fabric, and the TPU air bag is non-toxic and odorless. Nylon soft hook Velcro will not catch the head After-sale Service - Provide 1 year warranty for the extra large blood pressure cuff, free refund and replacement. If you have any quality concerns or other issues, please feel free to contact us by email Compatible Design - The blood pressure cuff upper arm is equipped with 7 connectors. 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" - 20.8" (22-52cm). The replacement cuff can be easily calibrated independently to improve accuracy Package Includes - XXX Large Blood Pressure Cuff, 4mm Connector, 4.6mm Connector, 5mm Connector, 6mm Connector, 7mm Connector, 7.2mm Connector, 11.3mm Connector, Quick Guide Manual