Hear how sixty stops work.
Drag the knob. Every unit is one audible, tactile click — one unit is exactly 0.01 ml. The pen physically stops at what's left in the cartridge, so you can't over-dial.
Demo environment. Illustrative fluid math only, not dosing guidance.
Same cartridge. Different mechanisms.
We don't make the pens, we make sure they're right. Every one is checked before it ships: that the dial draws the unit it shows, that the build and materials are legit, and that it's genuine, not a counterfeit. And because each takes the same standard 3 ml glass cartridge, you're never locked into ours.
V1
Widest single draw
V2
Easiest handling
V3
Classic capped feel
Gansulin
Mechanical click dial · overdraw stopThe pen, up close.
Machined body, direct-read dose window, knurled knob — the details that make it an instrument.
The zip case, included.
Structured shell, elastic pen holder, mesh pocket — the pen ships in a case built to live in a bag.
The numbers.
Every serviceable part of the pen, named.
Built like the instrument it is.
A solid metal chassis where the market default is disposable plastic. It sits heavier in the hand for a reason: it's meant to be kept, not thrown away.
Takes the universal 3 ml (300-unit) glass cartridge format. Fill it, seat it, prime it. No proprietary consumables, no lock-in.
One click per unit on the dial, a firm stop at the end of every dispense. Confirmation you can hear in a busy lab and feel through nitrile gloves.
One pen, refilled indefinitely, replaces a drawer of single-use devices. The cartridge is the only thing you'll ever reorder.
The dial physically stops when the dose you set exceeds what's left in the cartridge. If it won't turn, the cartridge can't cover it. The mechanism does the checking.
Set too much? Turn the knob back, down to the 1-unit minimum. The dose corrects without dispensing a drop. No purging, no lost material.
Before you ask.
Which cartridges fit this pen?
Any standard 3 ml (300-unit) glass pen cartridge. It's the most common cartridge format in the world. We stock them, and so does everyone else.
What does one unit mean on the dial?
One unit equals 0.01 ml of volume from a 3 ml cartridge. Our reconstitution calculator converts milligram amounts into exact clicks for bench math.
Do you sell needles?
No. The pen takes standard screw-thread pen tips (the manufacturer pairs it with 32G×4mm and 31G×6mm), and they're widely available over the counter. We sell the instrument and its cartridges only.
How should the pen be stored?
Away from direct sunlight and temperature extremes. With a filled cartridge seated, keep it below 86°F (30°C); refrigerate if your bench runs hotter.
Is this a genuine Gansulin pen?
Yes. Every unit is genuine, factory-sealed, and sourced directly from the manufacturer's supply chain.