CalExotics Advanced Silicone Pump Sleeve - Male Penis Pump Comfort Ring Accessory - 3 inch - Clear

The silicon ring does fit 2 inch cylinders. It does not fit snug but it seals to the bottom of the silicon and makes a very good seal. Also, its very comfortable and should last a long time because of the material it's made from. Not cheaply made and worth the money.

I bought the blue one. I have the 3" diameter California Exotics head pump and this fits slightly loose, but still gets suction. This will definitely be too big for 2.5" diameter pump. It's probably ideal for 3.25" or 3.5" diameter pumps. It is thick but pliable (thicker than the stock smoke grey sleeve that came with the pump), color is as pictured.The inner opening diameter is about 1.4", which is actually okay for a more slender fellow but probably way too small if you are thick. I was using a sleeve with 1" inner diameter and it was strangling my little friend, like I would get "caught" in the pump, which can be dangerous.

This sleeve is much more pliable than their Universal Fit one.That one has a much more rigid 1 inch diameter hole (when measured right out of the package).What model(s) is this *The Advanced*, made for?I have two pumps:a manual one that is 2 inches diameter and the other, an electric, is 2 1/2".This one, in general, gets too sucked up into the sleeve as you are reaching suction for a full erection (by (length).I have an electric pump made by the same company selling this sleeve.The pump cannot be left on too long WITH THIS SLEEVE (lubricated, of course) because even though "you" are "size compatible" with it's hole (sleeve unstretched), it will start to pull the testicle nearest to it INSIDE and vaccuum seal it and your lubricated penis as ONE.I don't use a penis pump as a method to create longer erections (a sex toy selling point); I use it for medical purposes to maintain blood flow in the vessels there after a man reaches, say, the age 40-50.A urologist recommended these penis pumps to do this.I told her about this sleeve.I told her about the difficulty in extracting the two even after the unit was turned completely off.