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Pen Cartridges & Injection Pens
Prefilled 3cc auto-injection cartridges and the reusable pen kit listed alongside them. Cartridges arrive as a solution — no reconstitution step. Check each product page for its compound, strength and fill volume. Sold strictly for laboratory research use only; not for human or veterinary use.
In StockRetatrutide Auto-Injection Pen Cartridge — 3cc Prefilled (Retatrutide + B12)
Retatrutide Auto-Injection Pen Cartridge — 3cc Prefilled & Sterile The retatrutide pen cartridge from…
In StockSemaglutide Auto-Injection Pen Cartridge — 3cc Prefilled (Semaglutide + B12)
Semaglutide Auto-Injection Pen Cartridge — 3cc Prefilled & Sterile The semaglutide pen cartridge from…
In StockTirzepatide Auto-Injection Pen Cartridge — 3cc Prefilled (Tirzepatide + B12)
Tirzepatide Auto-Injection Pen Cartridge — 3cc Prefilled & Sterile The tirzepatide pen cartridge from…
In StockV3 Injection Pen Kit with Travel Case
V3 Injection Pen Kit — Precision Dosing, Anywhere The V3 Injection Pen Kit brings…
Cartridges vs. lyophilized vials
A lyophilized vial ships as a freeze-dried powder that must be reconstituted with bacteriostatic water before use — see our reconstitution calculator for the mixing math. A prefilled cartridge arrives already in solution at a fixed concentration and loads directly into the pen, which is why it is the simpler format for repeat-dosing research protocols.