What is it?

Today during the HVAC portion of the inspection, I was looking at a Tempstar mid-efficency furnace and I noticed something inside the burner chamber I haven’t seen before (or that I recall seeing). It appeared be be some type of wire mesh. Does anybody know the what it is and what the purpose is? The photo may not be very good, but it’s the best I was able to get of what I’m talking about.

Thanks,
Chad

The use of the wire mesh burner minimises additional NOx formation