Broil King Regal™ Charcoal Offset 400 Grill & Smoker 955050The Offset Smoker 500 body is constructed from 2 mm 14 gauge steel with 500 sq. in. primary cooking surface, heavy duty cast iron cooking grids. Air vent system includes a chimney style stack with Roto Draft damper technology. Also features dual purpose smoke diffusing charcoal trays and a removable ash tray in both cooking chambers.