The MDF 808 B is a professional grade Aneroid Sphygmomanometer offering durability, portability and accuracy ideal for medical professionals in the hospital, nursing home, clinics or emergency medical setting. Gauge: A precise 300mmHg manometer attaining the accuracy of +/- 3 mmHg without pin stop. The easily identifiable high-contrast Dial is imprinted with mmHg and kPa (kilopascal) measurements for instant conversion. The die cast zinc manometer housing is finished in textured baked enamel and outfitted with a heavy-duty clip to easily attach to the gauge holder on the Cuff. 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 to attain correct arterial compression. The double tube seamless Inflation Bag isconstructed of crack & stick-resistant, high-density hypoallergenic latex-free PVC. The universal Bladder Tube enables compatible cuff exchange with all MDF and other branded BP systems. Inflation Bulb & Valve: Chrome-plated brass screw-type Valve with delivers precise deflation control rate. The Inflation Bulb is constructed of crack, stick-resistant, high-density hypoallergenic latex-free PVC.