Individually controlled burners with adjustable air control for a perfect flame Minimum 12 gauge steel construction 2,600 degree rated high density fiber board with refelctive technology Proprietary insulating bottom brick with grooves for easy pickup Operating pressure between 2-15 psi Capable of forge welding in minutes with less oxidation than competitive units 10' hose standard Easy to replace liners with removable top Same great features as the Mighty Forge 2-burner with the following improvements: steel pins that hold the walls and ceiling together, reinforced wire mesh brick, and bottom brick removable retention bracket Inside firebox dimensions are 11.5" W x 7.5" D x 3.5" H Main body is made with premium 12 gauge hot rolled steel 60 lbs.