Work hardened or not. The stuff I am referring to is new out of the box copper AC line sets and THHN,THWN,wire. The stuff you buy now is junk compared to what it was 5-10 years ago. Your lucky just to be able to roll out a AC line set and not kink or crack it. I work with it everyday and have for the past 25 years. We are talking same name brands with reputations in the industry not the stuff made in the Land of Almost Right.
