This Rocket Stove is built to last. It is made from 4” square tubing, and the top X flat bars on this stove are 8 3/4 inches long to support large skillets. They are made from 3/16 inch thick steel flat stock. The stove is made with a neat jet engine looking vent in the front that works great and also can be used to start your fire with small kindling. It has a nifty little damper on the side that opens with each notch to adjust the flame. The stove is finished with an excellent quality high temperature paint.