Genuine Janome / Elna Pre-wound Bobbins - 12 Count WhiteEach bobbin has 80 yards of 100% Spun Polyester Thread 60/2These pre-wounds are wound on genuine Janome bobbins which can be reused after thread is depleted. Knock off boxes of pre-wound threads are on generic bobbins that may not fit your bobbin case exactly.This pack was purchased from Janome which also makes the Elna Embroidery Machines!Ships Fast & Free!