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