Magic Bobbin Washers for Long-Arm Machines

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Special size for LONG-ARM MACHINES M BOBBIN CASES! Just slip our easy-to-use Mega Genie Magic Bobbin Washers into your M bobbin case, and you're ready to go! Eliminates the backlash and bird's nests on the underside of free-motion quilting when changing directions at high speed. Tough and long-lasting.