These 12 black pre-wound machine bobbins are the standard size L that fit in over 70% of embroidery machines made. They are 125 yards of continuous filament and have plastic sides. There are 12 bobbins in this listing. They are wound with high tech machines to provide a smooth uniform wind. There is much more thread on a prewound bobbin.
Please convo us if you need other quantities than what we have listed!