The Legacy desk model mercurial sphygmomanometer features an easy to read 300 mmHg scale. A locking device for the mercury reservoir prevents mercury spillage during transportation and when the unit is not in use. Comes complete with deluxe calibrated gray nylon cuff and deluxe air release valve. Latex-free inflation system made from the finest neoprene available. The unit is covered by a Ten Year Calibration Warranty and Five Year Warranty on the inflation system.