Bello Modo. It is copper wire with a nylon coating. It's very easy to manipulate but you do have to be careful not to mar the wire because you can chip off the color. It comes in many colors and gauges, I bought the 24 gauge to wire wrap some sterling wire clasps. Bello Modo has lots of different supplies to choose from, a nice web site, and very fast shipping but you have to pay a 15% "restocking fee" if you want to return anything. Is this something new? How could it possibly cost 15% to put an item back in stock? OK, my rant is over.