D'Addario H510 Helicore 4/4 Size Heavy Cello Strings are justifiably popular. Helicore strings offer warm, rich sound that's remarkably similar to gut or synthetic core strings. Unlike gut strings, however, Helicore strings' all-metal construction renders them impervious to fluctuations in humidity and temperature.
H510 Helicore strings have a multi-strand high-carbon steel core that produces flexible response and range. The core is overlaid with exotic alloy windings that provide extremely quick bow response and outstanding projection. The end result: D'Addario H510 Helicore Cello strings are extremely stable, versatile, and long-lasting under all playing conditions.