The Dynatron DY1206BH-625 is a all copper HSF. The fins are soldered into the base, that is surrounded by an aluminum shroud in which the fan is then screwed to. I had to take it all apart to give it a thourough inspection. Upon doing that I found that Dynatron is using the famous Delta 60x60x25mm 7K fan. To my surprise though this one is a little quieter than normal.