Solid stock aluminum, then anodized. Full frame construction. In my experience, that means you can beat the chit out of it and it will come back looking for more...
I have several small 3/4's and a big 11/12 with a conventional spool on it. 10 weight line and 400 yards of 30 lb. gelspun backing. One of the 3/4's is set up with a 25' 5 wgt shooting head, 50' of 50 lb. flat running mono and 200 yards of backing. I use that on a 7' 3 wgt Heritage rod.
www.tetonflyreels.com