New ThreadNanny 144 White Pre-wound L-Style Plastic Bobbins for Embroidery Machines (SA155) Size L 144 White Pre-wound Bobbins 60WT Poly Embroidery Threads High Quality Filament Polyester thread 60wt. Plastic Sided bobbins Will not snag or grab the top thread Spend more time Embroidering rather than winding bobbins. Embroidery Machines (SA155) Size L