Back Tank Elastic Straps/Webbing

[TriumphTrooper8]

I am in the process of replicating what was done to fasten the back hump/tank tot he back plate. There was a piece of black elastic webbing on the botton and the top of the tank. My question is what thickness is it? Looks like to me 1/2" or 5/8".

[Stroker]

It's a 1/2.