The Alchemia Trebles are made using a newly discovered blend of polymers derived from sugar- cane. With a transparent look, the sound of these strings is brilliant, clear and prompt. Unlike Fluorocarbon strings, these strings have an excellent vibrato and a significant timbre variations when played either close to the bridge or above the sound hole. They contain the sweetness and vibrancy of gut and the clarity and promptness typical of Fluorocarbon. Aquila Alchemia strings feature a sustain that is superior to any type of string currently available in the market. Also their sound projection outmatches that of Fluorocarbon strings. Although possessing an extremely smooth surface, they offer remarkable grip. The basses are made of silvered copper treated against early oxidation wound over a multifilament core. - strings for classical guitar. Features: normal Tension - manufactured from a new polymer derived from sugar cane - transparent - bass strings with New Nylgut Multifilament core and silver-plated copper winding - clear, brilliant and prompt sound - vibrance of gut and promptness of Fluorocarbon - superior sustain and sound projection - made in Italy