Hand Held Sphygmomanometers Latex inflation bulb fitted with filter-screen to reduce dust build-up and ensure precise deflation control and reliable service. Dip-molded, latex inflation bladder withstands heavy use. Lifetime calibration warranty on manometer. Features to black enamel, 300 mmHg, no-pin-stop, spring-loaded manometer measures blood pressure from 20 mmHg to 300 mmHg, certified accurate to ±3 mmHg. Navy-blue nylon cuff with range markings, artery label, gauge holder and hook-and-loop closure. Black leatherette, zippered carrying case. Mercury-free.