This BBQ island vent is made of the indestructible 16g 304 stainless steel and as all you need to do is mount two of these louvered vents (one hi, and one low) and that’s good enough for most bbq islands out there. Of course the more vents in the island the better and safer you are. These bbq island vents are the good ones and you will never have to replace them, they won’t rust, or corrode.