Designed for the rigors and unpredictable nature of field use.Accurate enough for the most demanding EMS professional. But priced low enough to be easily replaced. The EMI Procuff Sphygmomanometer has black enamel 300mm Hg no-pin stop manometer accurate to 3mm Hg. and carries a 10-year calibration warranty. It features a durable navy blue cuff with range markings to indicate correct cuff size. long-lasting latex inflation bladder and bulb. chrome-plated air deflation valve. and a sturdy air hose. It comes complete with a zippered leatherette carrying case and instruction manual