Thanks,
That's what I was told, It looks the same, and cuts like butter, but I still was'nt sure. those are black, but I got some brown pieces with that batch also. I don't know if It's the same as delrin/acetron because the writing is not on those pieces, but it does resemble it, just a different color. I have some smaller blue rod that came with them also, but I think that was a different material, and don't remember what it was called. I bought the stuff some time back to make collets, and the guy threw in a bunch of cuttoffs, so there were several materials, and hard to remember them all. Greg