This Listing is for  2 PCS STANDARD PIGTAIL BOBBIN CASES FOR BARUDAN EMBROIDERY MACHINE

These have ANTI-SPIN (NO BACK LASH) spring.  This is a small size bobbin case

This bobbin case have following substituted part numbers:

BC-DBZ(1)-NBL    KF220981      KF220440     KF221020      KF220980.