Size of cylinder

In a few days i’ll make a homemade vacuum and post the how-to in the spanish forum…

But I have some doubts… What size of cylinder i have to buy for center my gains in lenght? and what for increase in glans size?

Now I’m 6,8” bp x 4,8”

A cylinder with an ID of 1.75” should handle both your length and girth requirements. If you could, a 1.6 inch cylinder might be a better fit to go for length, but not sure if you can buy that size. 1.6 X 3.14159=5.0 girth. If you get a cylinder too large in relation to your girth, you will have a hard time keeping your balls from being sucked in the cylinder.

Thanks gprent101! I think the 1.6” tube I will crash it with my base or glans. I think it’s not for me:D

I’ll go to a shop where sell meth-acrylate tubes. So I’ll look for the 45 mm diameter one (1.77”) If don’t have it I’ll have no option and buy the 50 mm one (1.97”). Another option it’s buy all (1.6”, 1.77” and 1.97”) and make some benchmarks….:)

And what about the long of the tube? How many inches long I have to take it? (3 or 4 inches more?)

Thanks again

Your length is now 6.3? A 9 inch tube should be plenty.

NBP yes. BP it’s nearly 7” (6.8 or 6.9). OK

Yes, OK. Now pack it.

I was reading the 8th page of the sticky post “Vacuum Pumping 101” when I found in avocet8 words:

“To all of you - newbies should always buy 10” cylinders at least. Give yourself some length room. They don’t cost any more than 8” cylinders from most manufacturers.”

Now i’m confused, gprent101,

I think I’ll take it of 9 inches, but what will be the differences for my lengths purposes between one of 10” and the other of 9” ?

Guess it just depends on how optomistic you are!

Point is, extra height in a tube will not change your pressure values within it, so a longer tube is not a disadvantage. Further, if you do get to 8 inches L under pumped pressure, your glans is going begin to be smooshed up against the valve that pokes down at the top of the tube. That is very uncomfortable and can cause bruising or damage. A 10 L tube costs no more and gives you plenty of leeway.

I’m making my cylinder! In the shop have 2 diameters for my size 1.65” and 1.75”. I take the 1.75” one and i’m cutting it now! I’ll cut it at 10” length… :) i hope i’ll do some lengths gains with it…

I am new here but I have had great gains combining exercise and overall fitness and bodybuilding and surfing with the exercises. I am totally committed now to pumping and leaving the tube on .
I have 7 girth (circumference) and about 9.5 length ,. I had avoided the thicker tubes as the entrance size (inset) was critical so the tubes would not suck in the balls. Even though I have giant balls I still had issues . So I had my pump company man make me another big diameter tube ( 7.5 inch circumference) and he made it longer than I needed ( 11inch) and made the tube 13 inch .I thought it would be way too big but it feels great and is rapidly filling .he made a special double thick silicon insert ring that spreads out the pressure across a bigger area and he angled the tube and it is fantastic!~.. I prefer pumps and then leaving the tube on and have had enormous gains that way . A lot of the reason I am into increasing size and pump is to increase testosterone release that I use for bodybuilding and sports drive.. Being horny when you lift or exercise can really increase your gains in both areas.

I am positioned on pumps and the right tube designs to get great results with less effort and time..
Anyone else out there an expert in tubes / techniques that might have something I can add?

Other wise I get really excellent results with pump/ tube

Found that holding off a day or two or overnight can allow the Dick to get back to right proportions and natural length .

You already have a cylinder custom made to your requirements, but just for info, here is the chart we use to determine optimum cylinder size:

Selecting Your Cylinder Size