Both of my tubes are from PetSmart, and I can’t remember the diameter - 1-5/8” sounds about right. However, even with a 4.5”girth, and a good session, I can pack it wall-to-wall pretty well.
I have a short tube (about 7”) and a longer one (about 9”) and have added magnetic strips to the short one - just to see if it has any effect -
I saw a tube there that I am going to get next: it is rather eliptical, about 1.5” X 3”, and should be really good for “plastic deformation” work laterally.
My work begins in earnest soon, as I am coming off an extended “break” due to health and other issues, and will start over with the “newbie” routine” (about 2 months) to recondition, and then get back to a regular pumping regimen.
shalom
alex
"Treason doth never prosper; what's the reason? For if treason prosper, none dare call it treason." - Harrington
“I SWEAR BY MY LIFE, AND MY LOVE OF IT, I WILL NEVER LIVE FOR THE SAKE OF ANOTHER, NOR ASK ANOTHER TO LIVE FOR MINE.” Ayn Rand, (Atlas Shrugged)