H310-44M D'Addario Helicore violin string set 4/4 H311-44M D'Addario Helicore violin string E-1 4/4 H312-44M D'Addario Helicore violin string A-2 4/4 H313-44M D'Addario Helicore violin string D-3 4/4 H314-44M D'Addario Helicore violin string G-4 4/4