High Thread Tension Bobbin Case - Bernina 4, 5, 7 series
Golden-yellow bobbin case
Sometimes you need more tension on the bobbin thread than usual for embroidery, free-motion sewing or free-motion quilting. And that’s why you need the golden-yellow bobbin case.
This high thread tension bobbin case comes standard with the B 500 and B 700.
Watch video below on how this bobbin case works!
https://youtu.be/OyzBuFwLAxk