Pirastro Oliv Violin String SetPirastro Oliv Violin Strings provide the noble, classic sound of a sheep gut core that is wound, and polished by hand using traditional techniques. The combination of a gut core with fine aluminum, silver, gold, and tungsten winding in Oliv strings provides a brilliant, complex tone with an exceptionally rich sound. Lower string tension offers excellent response and comfortable playability. E Gold steel A Aluminum wound gut D Goldaluminum wound gut G