The Dutch oven in my set (the one pictured) is 5 qt, and rated for 350 degrees. I've used a similar one at higher temps with no problems, but you're typically not going to be cooking in those much higher than 375 anyway. The T-Fals with metal handles are rated to 500 degrees. I'm not fond of metal handles, though.
I also have a T-Fal 12-qt stockpot with a vented lid that I mostly use on the stovetop, but it's also rated for 350 degrees in the oven.
They are heavy-duty pots & pans, all non-stick. I'm not sure what the surface is, but it's not a teflon-type coating. It's more resistant to scratches, but I have o
nly wooden & plastic cooking utensils just in case.
You can look at them in-store at Walmart here in town, and supposedly Target also carries them. When I looked at the sets like we bought on-line, Target was $10 more.