Thomastik-Infeld Spirocore Solo … Thomastik-Infeld Spirocore Solo Bass H1 Item No. S38S Manufacturer Thomastik-Infeld Thomastik-Infeld Spirocore Solo … Thomastik-Infeld Spirocore Solo Bass H1, spiral core, chrome × Thomastik-Infeld Spirocore Solo Bass H1