Zyex ball-end synthetic core strings produce an extremely warm rich sound. Zyex strings are made from a new generation of synthetic material creating strings that are incredibly stable under drastic climatic conditions. Within a matter of hours Zyex settles in on the instrument with a sound that is warmer than most other synthetic core strings. Zyex is also an excellent choice for use on bright sounding instruments. Sized to fit medium-scale viola (body length 15-15-3/4 ) with a playing length of 14-1/8 (360mm) these medium tension strings are optimized to the needs of a majority of players. Packaged in uniquely-designed sealed pouches providing unparalleled protection from the elements that cause corrosion.