NGOSEW High Quality Bobbin Case for Singer Futura Quartet XL-400, FQ4, SEQS-6000, SEQS6700, XL550, XL580 #416444401 Made in Taiwan High Quality Replacement Bobbin Case for many Singer Sewing Machines Fits Singer Futura XL-400, FQ4, SEQS-6000, SEQS6700, XL550, XL580.