When I got my 1st embroidery machine, a Viking Designer 1 back in 2000 I bought a box of 144 NEB bobbins. Still have maybe less than half of them now. I now have a Viking machine that uses larger bobbins so the NEBs don't fit as well. From time to time I'll rewind the NEB thread onto my Viking bobbins just to use it up. I've also ordered and used BFCreations's bobbin in I think 60wt. She has around 6-8 colors including white and black. I also have all her brand thread too including varigated and metallics as I can use her threads on my quilt machine too when I want a shiny thread. BFCreation's prices are quite decent too. Her threads are polyester, not rayon that I can remember.