Brother Bablock XA5752121-5 Pack of Smallest Spool Holder Retainer Insert Cap 3/8x1/2" for 1100Yard Mini King Cones of Thread on Horizontal Spool Pins

Spool Cap Very Small/Special Brother/Baby Lock #s XA5752021 / XA5752121 Spool Cap Very Small/Special Brother/Baby Lock #s XA5752021 / XA5752121 This spool cap is designed to be used with spools/cones that have a larger center hole than the standard spool pin is intended for such as Isacord 1000m, Floriani 1000m, or Aurifil 1300m. It's use helps keep the spool/cone in place while allowing a smooth flow of thread for the machine.