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$1 Cartridge Refills
Dial Exact Units - No Guesswork
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Pick Your Pen
Two things set them apart — capacity and cap. The V1 holds up to 80 units; the V2 and V3 hold 60. The V2's cap stays on while you inject; the V1 and V3 caps come off first.
V1 - Closed cap - up to 80 units. The higher-capacity pen, best when you want more units per fill. Remove the cap to inject.
V2 - Open cap · 60 units. The cap stays on while you inject — nothing to remove. The simplest, fewest-steps option.
V3 - Closed cap · 60 units. Same 60-unit capacity as the V2, slim design like V1, with a cap you remove to inject.
Why Reusable?
Save Money
A reusable pen plus about $1 cartridges costs a fraction of disposable pens or stacks of syringes over a year.
Waste Less
Dial exact units and draw every last bit from the cartridge — nothing left behind.
Dose with Confidence
Click-based dosing is repeatable and easy to read, every time.











