Chain and mesh for back of center goal

[Don Wright]

So I searched CD for "chain" and another for "field" and another for "mesh" and didn't find any answers. I also logged into the FIRST Q&A and searched and didn't find anything. I also downloaded the latest field drawings and reviewed them (including the real field drawings), and found no specification... And then I searched the manual again with still no luck...

So, the chain and mesh that is hanging down at the back of the center goal... Does anybody know the specifications for either or both?