Standard Size Industrial Bobbin Cases Fits Most Commercial Embroidery Machine (5pcs-Pack) Replacement Embroidery Machine Bobbin Case Style L - With Anti-Backlash Spring Compatible with Tajima, Barudan, SWF, Happy and Toyota industrial embroidery machines. * It is not compatible with ZSK machines * These standard size industrial bobbin case are widely used in commercial embroidery machine. It has been tested and used by thousand of our clients in United States and Canada.