THAL-400-18 Thomastik Alphayue cello string set 1/8 medium THAL-41-18 Thomastik Alphayue cello string A-1 1/8 medium THAL-42-18 Thomastik Alphayue cello string D-2 1/8 medium THAL-43-18 Thomastik Alphayue cello string G-3 1/8 medium THAL-44-18 Thomastik Alphayue cello string C-4 1/8 medium TH-145-18 Thomastik Dominant cello string C-4 1/8 H511-18M D'Addario Helicore cello string A-1 1/8 H512-18M D'Addario Helicore cello string D-2 1/8 H514-18M D'Addario Helicore cello string C-4 1/8