P339020 Pirastro Chromcor cello string set medium P339120 Pirastro Chromcor cello string A-1 medium P339220 Pirastro Chromcor cello string D-2 medium P339320 Pirastro Chromcor cello string G-3 medium P339420 Pirastro Chromcor cello string C-4 medium P339160 Pirastro Chromcor cello string A-1 1/4-1/8