All are DMC embroidery threads. 30 threads in total (including 2 bonus threads). I received these after they were stored at home for many years. They are supposedly new and unused, but some may have fraying or fading. Please check the images for any fraying or other issues I noticed. I don't think there are any duplicate numbers, but please refer to the images. Recommended for those who want to try various colors. 553: I haven't measured it, but it feels like there's a little less. 917: The bottom is frayed. Two bonus threads. These have been stored at home for a long time, so please check carefully before purchasing. ⭐️ I plan to list other colors as well.