I have a Bernina and a Pfaff and they take specific bobbins. I have bought them on e-bay, in the sewing machine store and also JoAnns, cause they have packages on their notions wall that say "Berning", or "Pfaff" or whatever and if you can get them with their Half of Notions wall sale, they arn't so expensive. Take one of your bobbins with you to make sure that they are the same as what you have. I like having lots of bobbins, though I don't have 100 bobbins line gcathie, but I have at least 35 or more. I like to wind up a whole bunch of bobbins before I start sewing so that I don't have to stop and wind later. When machine quilting I will wind 4 or 5 bobbins with the color to match the backing, more if its larger and I plan to quilt more, Then I can just quickly change the bobbins. Having plenty of bobbins is a good thing. My Pfaff took both plastic as well as metal but they were Pfaff specific bobbins. My Bernina used the metal ones.