I bought 144 cardboard ones on ebay once. They worked great with my machine at the time. I have a few left, but found that the Bobbin Winder, what is it called -- The Sidewinder, will fill bobbins so much fuller, that I wind mine on that now and it is great. Really fills the bobbins, no matter which machine I am winding for. Some sizes don't fit on it, but all of my Janome's bobbins do. They are super for my embroidery machine, had to change the regular, wound on the machine bobbin, 3 times. Only used one bobbin wound on the Sidewinder for the same design.