Deluxe Aneroid Sphygmomanometers Not made with natural rubber latex. Inflation bulb fitted with filter-screen to reduce dust build-up and ensure precise deflation control and reliable service. Dip-molded inflation bladder withstands heavy use. Lifetime calibration warranty on manometer. Black enamel, 300 mmHg, no-pin-stop, spring-loaded manometer measures blood pressure from 20 mmHg to 300 mmHg, certified accurate to /-3 mmHg. Bladder, bulb and tubing are terracotta color. Navy-blue nylon cuff with range markings, artery label, gauge holder, and hook-and loop-closure. Black leatherette, zippered carrying case. Mercury-free.