A while ago I received a test string which I think was from Wilson. All I could find were the cellophane package with the string inside but no markings. The string appears to be a black, spiraled poly and looks to be 17 or possibly even 18 gauge. I had to really tighten my clamps so it wouldn't slip. Anyway, I strung it up and have hit with it a bit and really like the way it plays so far. Does anyone know if this string is now available commercially and if so what its called?