P342020 Pirastro Flat Chromesteel double bass string set medium P342120 Pirastro Flat Chromesteel double bass string G-1 medium P342220 Pirastro Flat Chromesteel double bass string D-2 medium P342320 Pirastro Flat Chromesteel double bass string A-3 medium P342620 Pirastro Flat Chromesteel double bass string Ext. E-4 medium P342520 Pirastro Flat Chromesteel double bass string B-5 medium