This is Nylon soutache - use for making Soutache jewelry. You can seal the ends by fusing with a lighter or other heat source. This is a little stiffer than our rayon soutache. Rochelle says that she actually likes it better, but cautions that it can be tricky to "find the spine" - determine which why it goes, which is apparently important. It's 3 mm, but you use on it's side, so it's .6 mm. Comes spooled - spool / packaging may vary from picture.
3mm x .6mm By the pack of 5 yards.