TH-IB-100 Thomastik Infeld Infeld Blue violin string set 4/4 blue TH-IB-01 Thomastik Infeld Infeld Blue violin string E-1 4/4 blue TH-IB-02 Thomastik Infeld Infeld Blue violin string A-2 4/4 blue TH-IB-03 Thomastik Infeld Infeld Blue violin string D-3 4/4 blue TH-IB-04 Thomastik Infeld Infeld Blue violin string G-4 4/4 blue