"Pro Series 1040100 Solo Black 48" x 32" Hitch Mounted Cargo Carrier"
https://smile.amazon.com/gp/product/B004UR2I9K/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Ubolts are plain steel 2.25" (I think) exhaust ubolts. A little grinding was needed on one of the ubolt plates. Def will rust. I am looking for a slightly better solution to replace the clamps. Could have probably painted but I didn't want to at the time. Once I come up with something different I'll swap out the clamps.