Famous for first class strings since 1956;Steel core strings, wrapped with thin threads of pure or alloyed metal ;Warm, brilliant tone and long durability;"Classic"series are the standard strings;"Silver Sound" series G string highly flexible steel core pure silver wound top layer;A Chrome Steel;String gauges/tension:;Dolce 0.44mm/5.1kp/11.2lbs;Medium 0.45mm/5.4kp/11.9lbs;Forte 0.46mm/5.8kp/12.7lbs;