SINGER 06542 Class 15J Bobbins, Transparent, 3-Count, Set of 3 Class 15J transparent plastic bobbins Class 15J bobbins are compatible with Singer Futura Embroidery Machines series 2600s, 3900s, 7400s, 8700s and Izek 1500 Made of plastic for durability Never add sewing thread to a partially wound bobbin as it may be uneven and cause thread to tangle or break Singer 15-J bobbin is a genuine singer part and is specially made to fit touch and sew, companion, confidence and futura embroidery machines This includes series 8700, 7400, 3900, 2600 and Izek 1500; Always use Singer 15-J Bobbins on these machines These are high quality premium sewing machine bobbins and each package contains (3) 15-J transparent bobbins