Gansulin Peptide Pen · Reusable Dial-a-Dose, 3 ml (1-60 Units)
The Gansulin pen is an all-metal, dial-a-dose instrument for standard 3 ml (300-unit) glass cartridges. Where the market default is disposable plastic, this is a machined metal chassis built to be kept: one audible, tactile click per unit, from 1 to 60 units, with a dose window you can read at a glance.
Single pen — $64.99. One all-metal pen with its zip case. Add cartridges and bacteriostatic water below to complete the setup.
2 pens — $119.98 ($59.99 each), save $10. Keep a spare on the bench, or share one. Both ship new in factory-sealed retail boxes.
4 pens — $219.96 ($54.99 each). Best value, save $40. The lowest per-pen price, ideal for a lab bench or a longer run.
Specifications
Specifications
| Product type | Reusable dial-a-dose cartridge pen |
|---|---|
| Body material | Anodized metal |
| Cartridge format | Standard 3 ml / 300-unit glass cartridges. No proprietary consumables, no lock-in |
| Needle interface | Standard screw-on pen needles (needles not included or sold) |
| Dose range | 1 to 60 units, in 1-unit (0.01 ml) increments |
| Dose feedback | Audible and tactile click per unit; firm end-of-travel stop |
| Overdraw interlock | The dial stops when the set dose exceeds what remains in the cartridge |
| Dial-back correction | Turn the knob back to reduce a set dose without dispensing a drop |
| In the box | 1 pen and 1 zip case |
| Origin | Ships from the USA |
| Intended use | Research, educational, and demonstration use only |
Genuine and new, shipped in a factory-sealed retail box.
Why buy this from Preppin Peppers
Sold for research, educational, and demonstration use only. Not a medical device, not sold sterile, and not for human or veterinary use of any kind. Not evaluated, cleared, or approved by the FDA. 18+.
Pairs with: standard 3 ml cartridges and bacteriostatic water for reconstitution. New here? See how a dial-a-dose pen works.
Common questions
What cartridges fit this pen?
Standard 3 ml (300-unit) glass pen cartridges, the same widely available format used across cartridge pens. No proprietary consumables and no lock-in.
How precise is the dial?
The dial sets 1 to 60 units per draw in 1-unit (0.01 ml) increments, with an audible and tactile click per unit and a firm end-of-travel stop.
Can a mis-set dial be corrected?
Yes. Dial-back correction reduces a set amount without dispensing a drop, and the overdraw interlock stops the dial when the setting exceeds what remains in the cartridge.
Are needles included?
No. The pen uses a standard screw-on pen-needle interface; needles are not included or sold by us.
What is in the box, and is the pen reusable?
One anodized-metal pen and one zip case. The pen is fully reusable; swap in a fresh standard 3 ml cartridge as needed. Ships from the USA.
What is this pen sold for?
Research, educational, and demonstration use only. It is not a medical device, is not sold sterile, and is not for human or veterinary use of any kind.
STORAGE & HANDLING
The pen is a mechanical instrument: keep it clean and dry at room temperature, protected from dust, moisture and direct sunlight. Do not leave it in a hot car and do not freeze it. With a filled cartridge seated, keep the pen below 86°F (30°C), per the manufacturer. The included zip case protects the dose mechanism in storage and transport.
SHIPPING & ALL SALES FINAL
Orders ship with tracking emailed to you. Please allow 5 to 10 business days for delivery within the US. We ship worldwide from the USA; US orders over $100 ship free. Given the nature of these products, all sales are final and items cannot be returned. If we shipped a wrong or damaged item, contact us within 7 days of delivery and we will make it right at no cost to you. See the shipping policy for details.
Frequently bought together
Reviews
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★★★★★✓ Verified buyer
instructions were thin
The pen is good and well made no issues there. But the little instruction sheet was pretty bare bones. Figured it out myself but a bit more detail would be nice for the price. Three stars just for that.
Preppin’ Peppers repliedThanks for the fair review, there. Notes like this are how we get better and we are already looking at it. Glad to have you on the bench.
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★★★★★✓ Verified buyer
exactly as described
exactly what the pictures showed. all metal decent weight smooth dial. sometimes stuff looks better online than real life but this was the opposite honestly

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★★★★★✓ Verified buyer
i keep it on my bench and honestly it looks cool. but its functional too, dials clean and the click is reassuring

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★★★★★✓ Verified buyer
seal is tight
The cartridge seats in there really snug and the seal feels tight. No wobble no leaks when I loaded it up for testing. Quality piece.

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★★★★★✓ Verified buyer
slow to ship
Product came sealed and the dial works smooth. only knock is it took like 5 days to ship. worth the wait tho

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★★★★★✓ Verified buyer
No more used syringes piling up. this reusable metal pen solves the whole problem. built like a tank.
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★★★★★✓ Verified buyer
replaces the whole syringe routine for my demos. dial a number show the click done. so much faster than drawing everything up. LOVE it

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★★★★★✓ Verified buyer
sooo good
this pen is sooo good. the number window is big and the click per unit makes it foolproof. def recommend

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★★★★★✓ Verified buyer
box came a little dented
Pen is perfect but the outer box arrived kinda dented on one corner. The pen inside was fine and still sealed so no harm. Just wish it was packed a bit better.
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★★★★★✓ Verified buyer
Ok so I was skeptical but this is legit. metal all the way, dials perfect, and shipping was insanely fast.

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★★★★★✓ Verified buyer
machined nicely
the threads are clean the cap fits snug the dial turns smooth. you can tell its actually machined metal and not molded junk. impressed for the price honestly

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★★★★★✓ Verified buyer
little heavy for some
I actually love how heavy it is but if u want something light this aint it. otherwise flawless. clicks nice and reads easy
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★★★★★✓ Verified buyer
the weight is what got me. this is not a plastic toy. feels like precision equipment. dial is smooth as butter

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★★★★★✓ Verified buyer
real product
came genuine and sealed. thats all I wanted. so many gray market listings out there and this one was the real deal. thank u

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★★★★★✓ Verified buyer
Exactly what I needed. fast shipping!!

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★★★★★✓ Verified buyer
clicks are loud and clear
you can literally count the clicks without even looking. each one is a number. super handy when Im showing someone how it works on the bench.
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★★★★★✓ Verified buyer
Not gonna lie I bought a couple of these for the lab and they all feel identical. Same click same fit. Consistent which matters when youre demoing to people.

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★★★★★✓ Verified buyer
genuine and sealed
Was nervous about getting some gray market overseas thing but this came sealed and genuine, shipped from the US. very relieved and its a great pen

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★★★★★✓ Verified buyer
fast US shipping
ordered monday had it wednesday. shipped from the US not sitting on a boat somewhere. arrived sealed. cant complain at all

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★★★★★✓ Verified buyer
stiff out of the box
works good. dial was pretty stiff the first day but its fine now. clicks nice and reads easy
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★★★★★✓ Verified buyer
beautiful piece
Honestly its kind of beautiful. the machining is clean and the numbers line up perfect in the window. very happy customer

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★★★★★✓ Verified buyer
grip is a bit slick
Solid build and it works well. The barrel is a touch slick when my hands are dry so I grip it careful. Not a dealbreaker just noting it. Shipping was quick.
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★★★★★✓ Verified buyer
dial a dose is the way. so much cleaner than what i had. clicks nice. shipping was quick too

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★★★★★✓ Verified buyer
precise
you can dial an exact number every time. thats what I care about. repeatable and no guessing. great little instrument.

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★★★★★✓ Verified buyer
arrived in 2 days!! sealed and everything. the metal is cool to the touch and it feels really well made
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★★★★★✓ Verified buyer
So glad I switched
So glad I finally got one of these. I was tired of the pile of used syringes stacking up on my bench. This is reusable metal and I just refill it. much cleaner setup now.

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★★★★★✓ Verified buyer
great but wanted 2
Good pen. only thing is i wish it came with a spare. ended up ordering a second one anyway. build is top notch

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★★★★★✓ Verified buyer
no more syringe mess
Whole reason I bought this was to stop dealing with the syringe draw and reading tiny lines. does the job perfect. dial and go.

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★★★★★✓ Verified buyer
wish the numbers were bigger
The pen itself is fine and machined well. My only real gripe is the numbers on the dial are kinda small and I have to hold it close to read them. Bigger print would help alot. Otherwise ok.
Preppin’ Peppers repliedThanks there. Honest feedback like this is gold for us. We are on it for future orders, and we are always here at [email protected] if you ever need anything.
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★★★★★✓ Verified buyer
not gonna lie i was worried it would feel cheap but nope. its got real heft. the click is crisp
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★★★★★✓ Verified buyer
quality metal pen. feels like a real tool not a throwaway plastic thing. worth it

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★★★★★✓ Verified buyer
takes standard glass
Big thing for me was no proprietary cartridge lock in. It takes a standard 3ml glass cartridge so I'm not stuck buying one brand forever. exactly what the listing said.

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★★★★★✓ Verified buyer
solid build
Feels like a real instrument. metal body, nice knurling on the grip. dials clean with a firm click each unit.

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★★★★★✓ Verified buyer
Genuine sealed product arrived fast. seller answered my question same day. cant ask for more than that

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★★★★★✓ Verified buyer
sealed and genuine
Was nervous about getting some overseas knockoff but this came sealed in genuine US packaging. Everything looked legit. Seller answered my question about it too before I ordered.

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★★★★★✓ Verified buyer
wish instructions were clearer
Pen itself is good but the instructions were pretty thin. took me a while to figure out the priming. once i got it its fine.
Preppin’ Peppers repliedAppreciate the honest feedback, Kevin. We have flagged this to the team so we can tighten it up on future units. Thanks for giving us a fair shot.
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★★★★★✓ Verified buyer
no more tiny syringe lines
honestly the best part is not squinting at those little syringe lines anymore. you just dial the number and thats it. wayyy easier on my eyes at the bench.
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★★★★★✓ Verified buyer
loveee it
loveee this pen honestly. its heavy and cold and just feels expensive. worth every penny
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★★★★★✓ Verified buyer
good but dial is stiff
Works great overall and the build is nice. Only thing is the dial is a little stiff turning up to the higher numbers. Might loosen up with use idk. Still glad I got it.

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★★★★★✓ Verified buyer
Does exactly what I wanted. no more squinting. the numbers are big and clear and it clicks per unit.

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★★★★★✓ Verified buyer
Sooo happy with this. shipping was fast, came in a nice box. dialing an exact number is way easier than eyeballing a syringe

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★★★★★✓ Verified buyer
The dial click is so satisfying. You can hear each number lock in. No mushy feeling at all. LOVE that.

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★★★★★✓ Verified buyer
quality machined pen
You can tell this is machined metal and not throwaway junk. weight feels premium. takes standard 3ml glass which was the whole reason i got it, no proprietary lock in.
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★★★★★✓ Verified buyer
heavy in a good way
Ok so I was not expecting it to feel this solid. The whole thing is metal and it has real weight to it. Sits nice on the bench and doesnt roll around. Very happy.
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★★★★★✓ Verified buyer
dial is a lil stiff
Works great overall but the dial is kinda stiff the first few turns. loosened up after a bit. still happy with it.

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★★★★★✓ Verified buyer
does what i needed
does exactly what i wanted. fast shipping!

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★★★★★✓ Verified buyer
Bought this because I was done with the pile of used syringes on my bench. dials smooth and the number window is easy to read. love it

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★★★★★✓ Verified buyer
click is satisfying
ok the little click when you dial is weirdly satisfying lol. arrived in 2 days sealed up nice. no complaints
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★★★★★✓ Verified buyer
This thing is SO much better than what I was using before. heavier than I expected in a good way, feels like actual metal not cheap plastic.

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★★★★★✓ Verified buyer
finally
So glad I found this. Tired of the syringe draw and squinting at those tiny lines. You just dial the number and thats it. build feels solid too.



































