"I thought I lost out on a chance to get more of these, since it was taken off my list after a few years. Glad to find it once again.

Pro:
Support my 3.25-in Doc Johnson pump's width. Most are designed to go up only 2.75-in. The package I got indicated it's only 3.0-in support base diameter, while the description indicated 3.25 with printed images as well. Either case, it actually support up to 3.25-in overall. Anything larger, that's a no-go.

If you're using extenders, this is godsent. Why? It also acts as a perfect supporting cushion base. How many used extender just to scream about the pain the hard plastic base hurts. This acts as a perfect cushion for any angle using with the extender, and provides 90-degree support during night time assist while sleeping on your back.

The thickness is awesome. Many other soft PTE and silicone donuts and cushions don't have the thickness I was looking for when this wasn't around. The thickness of this unit provided so much comfort on so many different level, while lasting quite a long time. One of my older one, although discolored, lasted over 8 years of usages at such a great price. The last one that I got was $15, and this is even cheaper. Didn't hesitate in purchase multiple unit.

Suction assist is extreme, either or grooming or non-grooming (as long as you don't have too much on the penile shaft. Once enough pressure (around 5-inHg) creates a pressure between the skin and the inner wall of the unit, you're golden. No leak of any kind.

Con:
Just one..the inner diameter. 1.5-in is not a whole lot during penile expansion. It's great in creating constriction required for an air tight, but holy molly, it strangles your manhood when your manhood is already beyond 1.5-in or more, and expanding larger during the routines. If there's an option for an inner 1.5-in to 2.0-in, that will be a perfect gift for any endowed man trying to turn into a demonic stallion."

"My first pump was a Doc Johnson Trigger Pump that my urologist recommended, it was excellent. But over time the trigger broke, and then a few weeks ago, the cylinder sleeve split. Sadly they do not make that model any longer. But I kept the cylinder, bought a new bulb handle and after a lot of research, purchased this cylinder sleeve.

This sleeve is different than what I used to have, much thicker and much less soft. With a little lube it does a good job and I have to say, it is better at preventing your testicles from being sucked up into the cylinder.

I have a 2.5" diameter pump so this fits well, but I cannot imagine using it with a wider pump. This sleeve, being very thick and rigid, doesn't stretch that easily. I would only get this if you have a 2.25" - 2.75" diameter pump. The opening of the sleeve is also 1.25", which might initially be too wide for some and not wide enough for others. Overall though, this is working but just isn't as comfortable as the soft silicone sleeve I had before. I wish I could find another just like it but there does not seem to be anything similar out there. I'm still searching though."

"Alright, so I tried a couple different of these and they always had trouble maintaining vacuum. Not terrible, since I use a cheap automatic pump that maintains a set pressure, but I always disliked how much lube I'd have to use to get it to not kick every 5 seconds or just constantly run, so I have this a shot.

It is really thick, and if your tube is less than 2.5 inches, I think this ring might not fit as nicely, but my 2.75 tube it fit great, and the thickness of the rubber did an amazing job of maintaining vacuum. Air would still leak out slowly, but very slowly and I'd feel it's the pumps end letting out air now.

Only complaint I could have is the thickness throws off the measure marks on the side of a lot of tubes and that the pressure was so well maintained I think the pump actually was slightly under reporting pressure. When I made the pump max out, it actually hurt a bit, when with previous rings I could go to max pressure for a few minutes before it started to even get uncomfortable. When to max and it felt ready to burst after a minute and a half."