144 pack of pre-wound bobbins size L. These bobbins are made from a clear plastic so you can see how much thread is still on the spool. Our unique embroidery bobbins have a special thread coating that maintains tension on the thread to prevent the bobbins from free-spooling in your machine. The coating is safe for all applications. 

Outside dimension is .826" and the width is .362". Center hole ID is 1/4".  These are wound with approximately 131 yards of thread. Benefits include parallel wind for smoother running, more usable yards per gross. Less waste = More yards, less down time, more production. No fuzz, lint, or wax buildup from paper bobbins. No distorted flanges from humidity or oiling. No jerks or jamming from distorted flanges.