Description Don't get over budget with the prosphyg 770 is our most economical aneroid. It is made with heavy duty construction with the black enamel 300 mmHG manometer provides accurate readings every time. It enabling the determination of systolic and diastolic blood pressure by increasing and gradually releasing the pressure in the cuff. The gray cotton cuff with its handy artery label and gauge holder comes complete with a latex free bladder and bulb and a chrome plated deflation valve that allows for precision deflation. Cuff fits a patient arm circumference of 9" to 15.8".