Aneroid and Mercurial Sphygmomanometer Aneroid or Mercurial sphgmomanometer , bold or thin glass tube, with or withour iron rings. \ 1.0~300mmHG 2.+-3mmHG error 3.3mm glass tube 4.CE ,FDA,ISO9001,ISO13485... Type: Blood Pressure Monitor Table sphgmomanometer