Blood Pressure Cuff Replacement-Sized for Upper Arm Circumference 8.6 to 20.4 Inches - for Adults, Seniors, Elderly. Feature: ✅ Simple to Install. ✅ Compatible Design. ✅ Adjustable Cuff Size ✅ Sturdy Nylon Construction. The D Ring Cuff Replacement The D Ring Cuff with high-quality nylon material to ensure its durability and endurance, skin-friendly, and comfortable for wearing. Super Adhesive Hook and Loop The D Ring Cuff with extended adhesive hook and loop to ensure the cuff size is suited for any size arm. The Arm Connect Tube The arm connects tube of the blood pressure monitor is for someone who has missed the original connect tube, yet if you have the original one, just use yourself connects. Compatible Compatible with most brands of digital/automatic blood pressure monitors How to use： ①Keep the lower edge of the cuff 0.8"-1.2" (2-3CM). ②The trachea is on the inside of the arm and aligned with the middle finger. ③The cuff should be placed on the arm at the same level as the heart. ④Leave some space between the cuff and the arm. Make sure one finger can be inserted. Precautions: The cuff is not placed in the correct position, which may affect the accuracy of the measurement. Tips: * If damage is found, the cuff should be replaced in time. The cuff should also be replaced. * If the monitoring device displays a message indicating an air leak. * If the connector that comes with the cuff is not suitable for your machine. Please replace it with the connector of your blood pressure monitor.