Product Specifications for Gypsy Jazz/Manouche/Maccaferri Guitars: Designed for guitars with a 670mm scale length to support the authentic tonal nuances and playing styles of Gypsy Jazz, Manouche, and Maccaferri. Sound Optimization for Brilliant, Clear Sound: Strings tailored for a typically brilliant and clear sound, ideal for Gypsy Jazz. Durability for Intense Strumming: Strings specifically designed to withstand the high demands of hard strumming. Steel Core with Silver-Plated Copper Wire for Sound Quality: Stable steel cores and silver-plated copper wire for a balanced tone and high-quality sound. Single String H2 .014 Extra Light with Loop End, 8.1kg/17.9lbs: Precision-tuned single string with a .014" diameter and loop end for optimal playability and balanced string tension.