Korpa 
The Kaplan Solutions viola A string produces a full, rich, and warm tone. It is designed to allow greater projection in the higher register of the instrument while balancing and blending well with the lower strings. Conceived with the professional performer in mind, it stands up well to extreme bow pressure, and provides a strong, soloistic tone quality without being overly bright. Kaplan Solutions viola strings are sized to fit long-scale viola (body length 16-16 1/2 inches) with a playing length of 15 inches (380mm). Heavy tension strings allow for greater projection and volume potential, while light tension strings allow for easier bow response. Medium tension strings are optimized to the needs of a majority of players.
K411 LM Kaplan Viola A String Long Medium