Thomastik-Infeld Spirocore Solo … Thomastik-Infeld Spirocore Solo Bass Fis1 Item No. S39S Manufacturer Thomastik-Infeld Thomastik-Infeld Spirocore Solo … Thomastik-Infeld Spirocore Solo Bass Fis1, spiral core, chrome × Thomastik-Infeld Spirocore Solo Bass Fis1