These Gudebrod 10/0 Threads (45 denier) are no longer produced. I was able to obtain them from Chris Helm of Whitetail Fly Tieing Supplies who purchased the remaining spools when Gudebrod discontinued the product. Black was completely sold-out when Chris acquired the remaining threads. One solution to obtaining 'Black' would be to color the white threads with a black permanent marker. These Gudebrod 10/0 Threads are dynamite for small fly and midge patterns where unwanted thread bulk is a primary consideration. Ed Engle, author of "Tying Small Flies" wrote "It's a true midge thread, wonderful to tie with. My life is changed."