Product information "Taylor Seville Thread Bobbin Topper PLUS Attachment for Bobbin and Sewing "
Attachment
for larger bobbins and yarns with a diameter of 10 - 16 mm, such as the
Aurifil, Isacord, Glide and Hemmingworth brands.
To prevent the bobbin thread from unwinding, the end of the thread is inserted
into the thread locking slot on the side of the bobbin cover.
Contents 8 units