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Mega Genie Magic Bobbin Washers

Special size for LongArm Machines M Bobbin Cases. Easy to use Just drop a Mega Genie Magic Bobbin Washer into your bobbin case, replace the bobbin, and you're good to go Eliminates the backlash and "birds' nests" on the underside of the quilt when changing directions at high speed. SAVES TIME, with less stopping and starting Pkg. of 12. Tough and longlasting.