Use this calculator to determine your correct pump cylinder width.
Room for 10 to 15% expansion is recommended. Do not exceed over 30% of your current size.
General consensus is to measure your thickest point.
ATTENTION *** FOR MEN WITH WIDE BASES:Use your widest base girth.
If you are trying to change shape or would like to focus higher on the shaft, measure your mid-shaft instead, while ensuring your base will still fit. And if you are relatively more oval-shaped or flat, or curved, you might need to go up a size to make sure it fits.
Select Your Girth
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Fatigue Calculator
Use this calculator to target your proper fatigue levels.
Length:
Fatigue Target (out of device): 2-3% longer. Strain Target (in device): 4-6% longer.
Girth:
Expansion Target: 4-8% thicker.
* More is not better. Reaching for the max does not mean a better session.
Fatigue Target
2-3% longer (out of device)
Strain Target
4-6% longer (in device)
Expansion Target
4-8% thicker
Unit Converter Calculator
This calculator converts between inches and centimeters. Enter a value in inches or centimeters, and the corresponding value will automatically populate in the other field.
Pressure Converter Calculator
This calculator converts between kilopascals (kPa) and inches of mercury (inHg). Enter a value in either field, and the corresponding value will automatically populate in the other field.
Quantity
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Penis Pump Kit – Clear Fitted Cylinder with Vacuum Handle, Gauge, Hose & Water Trap
Designed for men looking to improve erection quality, increase temporary fullness, and support long-term size-focused training, this fitted penis pump kit gives you the core equipment needed for controlled vacuum pumping.
Each kit uses a clear acrylic fitted cylinder with industry-standard fittings, making it compatible with common vacuum handles and accessories. The included vacuum handle features a pressure gauge so you can monitor pressure during use, while the silicone hose and water trap help keep the setup clean, controlled, and easy to use.
This kit is ideal for men who want a more precise fit than oversized generic cylinders. A properly fitted pump cylinder helps improve comfort, seal quality, expansion control, and overall pumping consistency.
For best results, choose a cylinder that gives you room for expansion without being excessively oversized.
We recommend allowing 10–15% room for expansion based on your current erect girth.
To calculate your recommended expansion range:
Current erect girth × 1.10 to 1.15 = recommended cylinder capacity
Example:
A 5.0-inch erect girth × 1.10 = 5.5 inches A 5.0-inch erect girth × 1.15 = 5.75 inches
In this case, the 2.0-inch cylinder would usually be the best fit because it allows room for immediate pump expansion and long-term progression.
We do not recommend choosing a cylinder with an internal circumference more than roughly 30% larger than your current erect girth.
Important for Men with Wide Bases
If your base girth is your widest measurement, use your widest base girth when selecting your size.
However, if you have an exceptionally wide base and want to focus more expansion higher on the shaft, you may choose to size based on your mid-shaft girth instead of your largest base measurement.
For easier sizing, use our Size Calculator.
Smaller Sizes
While we work on sourcing smaller cylinders, men below 4.0 inches in erect girth may need to look for a smaller fitted cylinder from another supplier that better matches these sizing recommendations.
Cylinder Length
Cylinder length usually does not matter unless you are close to reaching the top of the tube during pumping. For these kits, we currently use typical cylinder lengths that fit most users.
Routine Guidance
Start conservatively and build gradually. Use controlled pressure, monitor your response, and avoid aggressive over-pumping. Consistency and proper sizing matter more than excessive pressure.
Routines
Useful Links
Watch our full penis pump guide covering cylinder sizing, pressure control, beginner routines, water vs air pumping, erection quality, temporary expansion, and long-term size-focused training.
Watch our full penis pump guide covering cylinder sizing, pressure control, beginner routines, water vs air pumping, erection quality, temporary expansion, and long-term size-focused training.
Safety & Disclaimer
Adults 18+ only. Peak Male Physique is not liable for any outcomes resulting from product use. The customer assumes full responsibility. Any suggestions are optional and not a substitute for personal responsibility or medical advice. Our products are not intended to diagnose, treat, cure, or prevent any medical condition.
Store owner replied:
We emailed to troubleshoot and we can get you a replacement if needed. Here's some tips in the meantime:
Try to figure out where the leak is coming from: the top or the bottom of the cylinder, or the pump handle.
If it’s leaking from the bottom:
You might feel tiny air bubbles or a tickling sensation on your skin. Try trimming your pubic hair. Use lube on the base. Adjust the angle slightly up or down on your pelvic area until you find the sweet spot. (It can take a few tries to find the best fit.)
If it’s leaking from the top:
Make sure the valve on top of the cylinder is tightened, but don’t overtighten it. If the valve still leaks, you can wrap the threads with a bit of plumber’s tape to improve the seal - that’s worked for some customers.
Check the pump handle and hose:
Remove the hose, plug one end, and blow into the other end to see if the hose leaks. Press the unattached tip of the pump handle to your finger. Pump very slowly and lightly to check the pressure.
Store owner replied:
Try out troubleshooting tips to figure out where the leak is coming from: the top or the bottom of the cylinder, or the pump handle.
If it’s leaking from the bottom:
You might feel tiny air bubbles or a tickling sensation on your skin.
Try trimming your pubic hair.
Use lube on the base.
Adjust the angle slightly up or down on your pelvic area until you find the sweet spot. (It can take a few tries to find the best fit.)
If it’s leaking from the top:
Make sure the valve on top of the cylinder is tightened, but don’t overtighten it.
If the valve still leaks, you can wrap the threads with a bit of plumber’s tape to improve the seal - that’s worked for some customers.
Check the pump handle and hose:
Remove the hose, plug one end, and blow into the other end to see if the hose leaks. Press the unattached tip of the pump handle to your finger. Pump very slowly and lightly to check the pressure.
I got this as a way of keeping everything healthy (not for size, which I doubt beyond a temp boost). So far it's great. I bought a different brand that was a waste of time. This one works. My only complaint is that it didn't come with any instructions.
Great product very well built and clean. The extra rubber seal helps a lot keeping everything in place and you nuts from entering the tube which can be extremely uncomfortable. Works as described
Truly love the quality of this pump. It's not only obvious in the materials but also in the suction as well. I definitely can feel the difference between this and my old one. Looking forward to the benefits to come.
Store owner replied:
Hi Matt, we emailed to help troubleshoot but never heard back. We can also send a replacement free of charge if needed. Hope to hear from you soon.
Worked for like a week and now loses suction immediately. I messaged customer service, will see what they do about it. Way to quick for it to break, I am using it properly and babying it.
The attachment on the top of the vacuum tube leaks. To hold a steady pressure requires repeated pumping. I first thought the pump had a slow leak, or the seal against the base and my skin was the problem but it wasn’t.
Store owner replied:
Hey Robert,
We offer replacement both male and female connector pieces for the cylinder (female) and the hose (male). We emailed to let you know we could replace that for you and troubleshoot further. The valve might just need tightening, or some guys have luck with plumber's tape on the valve threads if needed.
The pump works well and is excellent. I hope to achieve the desired results and I will buy another, wider tube…. I highly recommend it; it's a fantastic pump 😊
