The CERTAS Plus Programmable Valve offers the ability to optimize the opening pressure of a shunt system before and after implantation. The CERTAS Plus Programmable Valve allows a surgeon to non-invasively change the opening pressure to one of eight performance settings, which range from 1 (low pressure) to 7 (high pressure), plus performance setting 8, which is a “Virtual Off.” The setting of the CERTAS Plus Programmable Valve is changed through the use of an externally applied magnetic field. Applying a specific magnetic field to the adjustable valve mechanism will permit the cam to turn slightly, increasing or decreasing the tension on the spring, and changing the setting of the valve.  We provided mechanical engineering and Industrial design for the number of components in this system.