Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass D 1/4 Item No. 3874.3 Manufacturer Thomastik-Infeld Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass D 1/4, spiral core, chrome × Thomastik-Infeld Spirocore Bass D 1/4