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 has G and C strings with a highly flexible steel core wrapped with pure silver;A Chrome Steel;Fast response with warm timbre;String gauges/tension;dolce 0.43mm, 6.44kg/14.2lbs;medium 0.44mm, 7.15kg/15.8lbs;forte 0.45mm, 7.4kg/16.3lbs;