Looks to be made of 16 gauge about an 1/8 thick material to sit coals on or what ever. The wrap around wind break is very thin but will do the job it’s intended for. The price was low and I couldn’t make one for that price. Overall I am pleased with my purchase and would buy it again. I put fire brick in mine and welded a moveable cooking rack. I made it like a Santa Maria grill and use it quit a bit.