Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass E1 3/4 Item No. 3885.5 Manufacturer Thomastik-Infeld Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass E1 3/4, spiral core, chrome × Thomastik-Infeld Spirocore Bass E1 3/4