The mesh/type of metal that's in the middle of this headache rack:
I've searched for perforated metal, and was only able to find circles and random shapes cut out. I then searched for expanded metal, and got metal with the little holes in it...
Need to find something similar to this for the headache rack I'm building for my truck. I haven't really been able to find any metal like the above picture, but am thinking I'm not searching for the right type of metal... (if that makes sense!)