Help - I bought some prewound bobbins on an internet site. They are 7/16th of an inch tall and only around 1/2 inch wide (maybe even a little smaller) They are way to small for class 15 that I need for my machine same height but not as large across.
Outside the plastic bag it says Spun polyester , Mill Devices Co. , Gastonia, NC.
Any ideas what these little bobbins are used for? :?:
They come 12 in a tube and 12 tubes in a pack. All white.