Dial the dose. Don't eyeball it.
An all-metal click-dial pen for standard 3 ml glass cartridges. One click per unit from 1 to 60, a dose you can correct without dispensing, and a dial that stops before the cartridge runs dry. The pen is $69.99. The complete kit, with cartridges and bacteriostatic water, is $99.
Free US shipping over $80 (the kit qualifies). International free over $100. Ships worldwide.
Pen vs. syringe
A syringe asks you to read a graduation line by eye, every time. The pen counts for you.
| Syringe | Gansulin pen | |
|---|---|---|
| How the volume is set | Pull the plunger to a printed line and judge it by eye | Turn the dial: one audible click per unit, read the number in the counter window |
| Smallest step | Depends on the syringe size and how well you can see the line | 1 unit (0.01 ml), the same on every dose |
| Set too much | Push some back out and re-read the line | Dial back. Nothing is dispensed while you correct |
| Not enough left | You find out mid-draw | The dial physically stops at what the cartridge still holds |
| What gets thrown away | The whole syringe, every time | Only the cartridge. The metal pen is refilled indefinitely |
Three things the mechanism does for you
Can't overdraw
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.
Dial back, waste nothing
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.
Standard 3 ml cartridges
Takes the universal 3 ml (300-unit) glass cartridge format. Fill it, seat it, prime it. No proprietary consumables, no lock-in.
Start with the complete kit
The pen on its own still needs cartridges and a diluent before it can do anything. The kit is the three things in one order, and it clears the free-shipping line.
Complete Starter Kit
- 1 × Gansulin all-metal reusable pen, with zip case
- 5 × standard 3 ml glass cartridges, individually pouch-sealed
- 1 × 30 ml bacteriostatic water (Pfizer Hospira, USP)
- Illustrated English user manual (PDF)
Double kit (2 pens + a 10-pack of cartridges): $169.99
Gansulin Pen
- 1 × all-metal pen with zip case
- Add cartridges and bacteriostatic water separately
- 2 pens $134.99 · 3 pens $194.99
Prefer amber glass? The amber starter kit is $102.
The numbers
- Dose range
- 1 – 60 units per dispense
- Dose increment
- 1 unit (0.01 ml)
- Cartridge format
- 3 ml / 300-unit standard glass
- Body
- Metal, machined dial knob
- Needle interface
- Standard screw-thread pen fitting (needles not included or sold)
- Dose correction
- Dial-back, no dispensing
- Overdraw protection
- Mechanical stop at remaining volume
- In the box
- Pen · zip case
Questions people ask before ordering
What does one unit on the dial mean?
One click is one unit, and one unit is 0.01 ml of whatever is in the cartridge. Sixty units is 0.6 ml, the maximum for a single dispense. The counter window shows the number you have dialed.
Does it come with needles?
No. The pen takes standard screw-thread pen needles, which are widely available. We do not include or sell them.
Which cartridges fit?
Any standard 3 ml (300-unit) glass pen cartridge. The kit ships with five clear ones; we also sell 10-packs in clear and amber glass.
What is bacteriostatic water for?
It is the standard diluent used in laboratories to reconstitute lyophilised material. The kit includes one 30 ml vial (Pfizer Hospira, USP) so the first setup is complete on day one.
One order. Everything the pen needs.
Pen, five cartridges and bacteriostatic water for $99, free US shipping included.
PreppinPeppers sells laboratory hardware: reusable pens, glass cartridges and bacteriostatic water. We do not sell, supply or advise on peptides or any other compound. Products are sold as laboratory equipment for research use. Free shipping thresholds: US orders over $80, international over $100.
