Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass D 3/4 Item No. 3885.3 Manufacturer Thomastik-Infeld Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass D 3/4, spiral core, chrome × Thomastik-Infeld Spirocore Bass D 3/4