Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass E1 1/4 Item No. 3874.5 Manufacturer Thomastik-Infeld Thomastik-Infeld Spirocore Bass … Thomastik-Infeld Spirocore Bass E1 1/4, spiral core, chrome × Thomastik-Infeld Spirocore Bass E1 1/4