Which pen?

Both pens take the same standard 3ml cartridges and the same universal pen needles. Compatibility is identical — choose by feel and budget.

AminoPen Pro — $26.99

The newest-generation dial, machined metal body, firm click-stops at every 0.01ml. Noticeably more solid in hand. If you reconstitute regularly and want the pen that no other US shop carries yet, this is it.

AminoPen Go — $17.99

Reinforced polymer body, same click precision, lighter weight and lighter price. The smart way to ditch single-use without committing to the premium build.

The short version

• Want the best build and the newest generation? Pro.
• First reusable pen, or want a backup? Go.
• Either way: same cartridges, same needles, same case compatibility within its size class.

Still deciding? The Complete Recon Kit includes your choice of pen plus everything else you need in one box.