Reusable peptide pens Refill it. Reuse it. Dial it in exactly.

What is a peptide pen?

A peptide pen is a reusable injection pen you refill from a standard 3 mL cartridge, instead of a disposable you replace after every vial. RefillPen is the reusable peptide pen built for the peptide community — it fills straight from your vial for quick, accurate, variable dosing.

It's a new generation of reusable injection pens with a sleek, intuitive design that simplifies peptide prep: hassle-free setup directly from your vial, a seamless injection experience, and 50 color combinations across the V1, V2, V2.5, and V3 models. Every pen comes with a 3 mL cartridge, and every order includes the starter tools, so you can start the same day it arrives.

• ✓Hassle-free setup directly from your vial
• ✓50 color combinations across the V1, V2, V2.5, and V3 models
• ✓Every pen comes with a 3 mL cartridge, and every order includes the starter tools