White Embroidery Bobbins "Size a - Class 15" 144 Polyester Prewound Bobbins for Brother, Bernina, Babylock, Janome and Kenmore Embroidery Machine, Top Quality Smartneedle Product. Check Image Chart for Compatibility, Compares or Exceed Brother and Neb Quality. From Smartneedle, high quality & great value! 144 White Prewound Bobbins 'Type A - Class 15' , 132 usable yds per bobbin High Quality bobbin thread 60 wt. Comparable to Neb and Fill-tec bobbins Saves time and last longer. Check compatibility list on images Plastic bobbin is not affected by oils