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