It's just a regular 55-gallon steel drum. Picked it up at the salvage yard for $5. I used a wire wheel on my right-angle grinder to take off the paint. Go to Permsteading.com • View forum - Heating and Cooling to read alot of good threads by people who have built and used these stoves. Follow their footsteps and you'll have a good-running stove. Don't make the noob mistake of "Well, i don't have X so i'll make mine smaller here, and just run the exhaust out the window cause i don't wanna cut a hole through the roof", then complain cause it doesn't work right or it smokes up your house. Don't be afraid to ask me questions, i like to help people new to this technology.