Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass D 1/2 Item No. 3887.3 Manufacturer Thomastik-Infeld Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass D 1/2, spiral core, chrome × Thomastik-Infeld Spirocore Bass D 1/2