Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass E1 1/2 Item No. 3887.5 Manufacturer Thomastik-Infeld Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass E1 1/2, spiral core, chrome × Thomastik-Infeld Spirocore Bass E1 1/2