Ernie Ball coated strings, 1 set Unopened. Gauge: 09-42 D'Addario, 2 sets I'm not sure about the gauge because it's not written. One is unopened, and the other has been opened but is unused. I immediately put it in a Ziploc bag. It doesn't appear to have any rust. All 3 sets are over six months old, so I cannot guarantee the condition of the strings. Please consider them as junk. No price negotiations.