Here ya go Jerico.
2-3/8" diameter tubes. Mine are roughly 12" long.
Bottom tube tapped 1/4-20 on the ends.
Top tube has female seat belt welded to it. There is a washer pinned to it on the back end so it can't slip through the receiver tube too far or let the tube come out of the net.
Your choice which way to go on the latch. You could have the female welded to the car.
4 receiver tubes 3/4" long, not sure if they are 1/2" or 5/8"? Tube I.D. is obviously big enough to fit the O.D. of the net tube. My bottom receiver tubes are mounted slightly towards the inside of the car for ease of tube removal and you don't get hung up on them.
Once the bottom part is bolted in, you just slide the top tube into the back receiving tube, click the belt and you are done. Pentastar was cut from an old MP sticker and fits perfect. I think it's a GM belt that the buckles came from.