Welch Allyn Tycos DS58 Hand Aneroid SphygmomanometerWelch Allyn Tycos DS58 Hand Aneroid Sphygmomanometer The Welch Allyn Tycos DS58 Hand Aneroid Sphygmomanometer has fewer moving parts than traditional sphygmomanometers. It features a lightweight and shock resistant gauge that can withstand a fall of up to 30 inches onto a hard surface and still remain accurate. DS58: Model DS58 Gauge Only DS58 MC: Platinum Series Hand Aneroid Set, Family Practice Kit , 4 Cuffs DS58 PD: Platinum Series Hand Aneroid