Yep those are still 6061, and still US made. Not exactly sure when they switched to taiwan. Normally easton tubing for program and varilite and elite(i think) is 7005, but these later zaskars were easton tubing, but 6061, don't know why that is, maybe because having easton tubing was all cool at the time, as it was bike specific tubesets, so you had to have the sticker on there...but also it had to be 6061, cause that was a zaskar.