The gauge tells you the number.

Our electric pump, rebuilt from scratch for trans masc, FTM and nonbinary bodies. It builds the suction for you and shows the pressure in kPa on a digital gauge.

Most pumps leave you guessing where you are. This one shows you — so every session feels safe, intentional, and yours.

Waterproof and USB-C rechargeable. Pairs with the Jack stroker: the Pro Pump + Jack kit is $159.99 ($29.99 less than buying both).

Built by New York Toy Collective — creators of the original Trans Masc Pump and over a decade of gender-affirming design.

Product Details

Real numbers, not a guess — the built-in digital gauge shows exactly where you are in real time, so every session stays safe and intentional.
Made for your anatomy — cylinders molded specifically for bottom growth (not repurposed nipple pumps), for a better seal, better fit, and better results. Stack them for discreet storage. Manual mode — you set the pressure.
Auto Mode — consistent cycle, hands free
Pulsing + multiple intensity modes — built for growth and pleasure
Fully waterproof & USB-C rechargeable
Works pre-T & post-T — with or without hormones

Your questions, answered

What's the difference between a manual and an electric pump — and why electric?

A manual pump you squeeze by hand, building suction by feel. The electric Pro creates and holds the suction for you and shows the exact pressure on a digital gauge. Choose electric if you want hands-free auto and pulse modes and repeatable sessions instead of guessing — the same routine, the same numbers, every time.

Which cylinder size should I start with?

Three sizes come in the box. Start snug but comfortable — a good seal matters more than size. Most people begin with the smallest cylinder that fits without pinching, then move up as their body responds. Full fit guide: What size pump cylinder do I need?

How much pressure should I use?

Start in Manual, Level 1 — it caps at 35 kPa, a gentle range. You're aiming for soft fullness, never pain, numbness, or color change. Because the gauge shows real numbers, you can repeat exactly what felt right. Levels 2–3 go much stronger (up to 55 kPa) — don't use them without talking to a provider first.

Is the Pro beginner-friendly, or too strong for beginners?

It is our most powerful pump. Start in Manual, Level 1 with short sessions and you're on gentle ground. If you want a manual pump, the Deluxe is the simpler start; the Pro is for when you want to see your numbers. Compare all three pumps.

Do I need to be on T to use it?

No. It works on T, pre-T, or never on T. Testosterone drives most bottom growth, but the pump's session effects — blood flow, fullness, sensitivity — don't require hormones. Cylinder fit matters more than how long you've been on T; three sizes come in the box.

How often should I pump?

Start with 2–3 sessions per week, 5–10 minutes each, gentle pressure. Build up slowly and take breaks — recovery is part of it. With the gauge you can keep sessions consistent rather than chasing intensity.

Does pumping hurt?

It shouldn't — done right it feels like gentle warmth and fullness. Pain means too much pressure: release the valve and rest. Go lighter next session. The gauge exists exactly so you never have to guess.

How discreet is shipping?

Always a plain, unmarked box — no logos, no product names outside. Your card statement reads New York Toy Collective.

The science behind pumping

Bottom growth is driven mostly by testosterone. Androgens act on receptors in genital tissue to enlarge the clitorophallus — a well-documented effect that's most rapid in the first year on T (Grimstad et al., Andrology, 2021).

Where a pump comes in: blood flow. Vacuum devices use gentle negative pressure to draw blood into erectile tissue and raise the oxygen level in it — the same mechanism used in penile-rehabilitation medicine (Lin et al., Asian Journal of Andrology; Yuan et al., International Journal of Impotence Research). More blood flow is what produces the temporary fullness and heightened sensitivity you feel during a session.

Our caveat: that vacuum research was done on cis men for erectile function — no one has run a long-term study on trans masc bottom growth specifically. What's solid is the session effect (blood flow, fullness, sensitivity). Lasting change varies by body. We can't promise numbers, and nobody can. We include measuring tools so you can track what's real for you.

Sources: Grimstad F, et al. Andrology 2021 · Lin H, et al. Asian J Androl · Yuan J, et al. Int J Impot Res

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