With its lifetime calibration, the MDF Professional Aneroid Sphygmomanometer is ideal for medical professionals in all settings. Stress-tested over 3,000 times and calibrated 5 times before final assembly, it is one of the most durable, accurate, and dependable blood pressure measurement devices on the market. Gauge: A precise, certified 300mmHg manometer attains the accuracy of +/- 3 mmHg without pin stop, and features an easily identifiable high-contrast dial. The die-cast zinc manometer housing is finished in textured baked enamel and outfitted with a heavy-duty clip so it can be easily attached to the gauge holder on the cuff. Cuff & Inflation Bag: Resistant to abrasion, chemicals (chlorine and peroxide), and moisture, the adult Velcro cuff is constructed of high-molecular polymer nylon. Sized to meet American Heart Association recommendations, the artery indicator label and index range further ensure proper cuffing for correct arterial compression. The double tube seamless inflation bag is constructed of crack-resistant, non-sticking, high-density hypoallergenic latex-free PVC. The universal bladder tube enables compatible cuff exchange with all MDF and other major brands of BP systems. Inflation Bulb & Valve: Chrome-plated brass screw-type valve with delivers precise deflation control rate. The inflation bulb is constructed of crack-resistant, non-sticking, high-density hypoallergenic latex-free PVC. Included Accessories: Nylon zippered carrying case with Velcro side pocket, ID tag. Warranty and service: Lifetime calibration; 3 year warranty on bag, gauge, cuff, bulb, and bladder.