Dean Markley Master Series™ Classical Strings are some of the highest quality classical guitar strings available!Master Series™ Classical Strings provide superior tone, excellent feel, tuning stability, and extended life. They’re used and loved by classical performers worldwide. For rich bass tone and a smooth feel, Master Series™ bass strings are precision wound with the highest quality Silver-Plated Copper wire wrapped over extremely durable, stranded nylon cores. The treble strings are made from the finest grade polished nylon.