

Finding the smaller one was not easy but I did find it on line at Home Depot. Some of their stores may even have them in stock?
Looks like the smaller one cost more? But here is what I bought. I had ask what the center to center on the bolt hole were and was told 4.5" and that was the size I needed for my project.
https://www.homedepot.com/p/Rugged-Ridg ... lsrc=aw.ds
Amazon listed this one from the measurements I had taken at Harbor Freight then its the larger one.
https://www.amazon.com/VIPER-ATV-UTV-Ro ... f0&hvadid=
I did seal off over half of the air holes on the back of my cabinet and my vacuum system is working great and doing what is needed and no media comes out of the hole where I mounted the rollers

Boy I hope I can get my picture to upload and if not I will have to figure another way to do it?? I have never had any problems in the past posting pictures. I posted it to my FB page so just maybe this will work?
https://www.facebook.com/photo.php?fbid ... =3&theater
https://imgur.com/a/78hori5