Pirastro Obligato viola corde LA-1 thick, steel core, aluminum
Pirastro Obligato viola corde RÉ-2 soft, synthetic, silver
Pirastro Obligato viola corde G-3 soft, synthetic, silver
Pirastro Obligato viola corde RÉ-2 thick, synthetic, silver
Pirastro Obligato viola corde G-3 thick, synthetic, silver