So there is an aluminum deflector plate which sits on top of the adapter that I use when it get's up to temp. It's a steel adapter. It has cross bars which allows me to use it for a two level cooks also. Sometimes I cover the hole with heavy duty foil and use it as "smoker". I use this thing all the time. Just had a BBQ/ wood fired pizza party last weekend and I made 34 pizzas in it. They cooked in 2-4 minutes. It can get up to over 800. Love the set up. On a side note, MAN my beard was small there. haha