Great for underthread sewing or bobbinwork, this red bobbin case is found in the accessories catalog and marked by a small triangle.

The red bobbin case is compatible with the following machines:

• B 700 E, B 720, B 735, B 740, B 770 QE, B 770 QE PLUS, B 790, B 790 PLUS
• B 500 E, B 535, B 540, B 570 QE, B 590
• B 435, B 475 QE, B 485, B 480