The Erkameter 3000 Mercurial Sphygmomanometer is a modern ergonomic, high German quality, CE marked table mercurial sphygmomanometer. 
Features: 
An unbreakable capillary instead of a conventional glass tube 
Automatic safety mechanism which stores mercury outside of the capillary when not in use 
Relief valve avoids pressures of over 315mmHg. which damage the air filter with subsequent mercury loss 
Square section capillary 
Discharge [...]