Mega Genie 6943A Magic Bobbin Teflon Washers, Anti Backlash, Anti Birds Nest Inserts, 12Pk for M Style Metal Bobbin Cases, Longarm Quilting Machines

Special size for Long-Arm Machines - M Bobbin. These slick space-age washers eliminate the backlash in the bobbin when changing directions at high speed. Backlash creates "birds' nests" in free-motion quilting and embroidery. Just drop a Mega Genie Magic Bobbin Washer in the bobbin case, replace the bobbin and you're good to go! Fits all domestic machines. Package of 12. Tough and long-lasting. Model: 6943A