You sir are looking at a 2" piece of PCV piping used for plumbing with a notch filed into the one end to hold the end of the tubing.
I did use a readily available tubing bender to get the 1st 90' bend going from the M/C then used the piping to create a perfect circle for the anti-vibration loop.
Since I used the 2" pipe, I didn't need to go more than 1 loop.
Some people insist that there has to be at least 2 loops to serve correctly but IMHO thatis if you want to create a tighter loop of something like a 1 1/2" loops.
It a very effective tool in the right hands.
You can practice with some scrap tubing if you have some.
You can use smaller diameter piping for tighter bends as well but you have to get the bend correct as possible as you want to avoid twsting the tubing to much when making angle corrections.
It will make most of all your work look like it was factory bent!