1. Part number: KP-19393

2. Part name: Bobbin Case Spring

3. Quantity: 20PCS

4. Compatibility

a.No-Back-Lash brake spring which puts constant , light pressure on bobbins to overcomemomentum. Bobbins stop spinning faster, preventing unraveling or tangling of bobbin thread when sewing operations stop and start.

b.This high quality Large M (1") Bobbin Case Spring replacement is exactly compatible with  Bernina Q16, Q20, Q24 Sit down Longarm Sewing Machines.