Here is a close-up of the device...
photo by Lagerdemain
You'll want to use 3/4" cpvc for resistance to heat and warping. As for the ring find whatever you can that is about 6" - 9" in diameter. I used a 6" cpvc cap and cut off the top on a bandsaw. The paint stariners come in 1-gallon and 5-gallon sizes. Attach the strainer with a hose clamp and secure with a few TEC screws.
...and here is the device in use...
photo by Eimajz
As you can see this will work as either a hop bag or for steeping your grains.
Thanks for getting your
Butch on