THSP-100-14 Thomastik Infeld Spirit! violin string set 1/4 medium THSP-01-14 Thomastik Infeld Spirit! violin string E-1 1/4 medium THSP-02-14 Thomastik Infeld Spirit! violin string A-2 1/4 medium THSP-03-14 Thomastik Infeld Spirit! violin string D-3 1/4 medium THSP-04-14 Thomastik Infeld Spirit! violin string G-4 1/4 medium