Reusable Peptide Pen Injector V3 UK (3ml Cartridge Pen)

Description

Newer version available: the V5 pen adds an 80 IU dosing scale and a retracting needle, with the same glass cartridge end. Available to pre-order now.

Peptide Pen Injector — Reusable 3ml Cartridge Pen (V3)

A precision reusable injection pen engineered for researchers working with reconstituted peptide solutions. Constructed from anodised aluminium with an aircraft-grade body, this pen accepts standard 3ml borosilicate glass cartridges and delivers controlled, repeatable volumes with dial-in precision — making it a preferred delivery device for laboratory peptide research protocols.

Compatible with the Optimised Lifestyle 3ml Sterile Glass Cartridges and standard insulin-gauge pen needles (31G recommended). Designed for use with aqueous reconstituted solutions prepared with sterile diluent.

⚙️ Technical Specifications

🔬 Why Researchers Use This Pen

• Precision dosing — Dial-in mechanism eliminates the volume estimation errors common with conventional insulin syringes, critical when working with small volumes of concentrated peptide solutions
• Repeatability — Consistent click-mechanism delivery reduces inter-injection variability in longitudinal research protocols
• Cartridge system — 3ml cartridges hold significantly more reconstituted solution than standard vials, reducing reconstitution frequency in extended research protocols
• Cost efficiency — Reusable aluminium body; only cartridges and pen needles require replacement
• Sterile handling — Sealed cartridge system minimises contamination risk compared to multi-draw vials with conventional syringes

🧪 Setting Up Your Research Protocol

New to the pen? Watch the step-by-step video and read how to use a V2, V3 or V4 peptide pen — load, prime, dial and press the plunger.

Step 1 — Reconstitution
Reconstitute your lyophilised peptide in sterile diluent to your target concentration. Common research concentrations range from 2–10mg/ml depending on the compound and protocol.

Step 2 — Loading the cartridge
Draw the reconstituted solution into a 3ml borosilicate glass cartridge using a standard syringe. Insert the cartridge into the pen body.

Step 3 — Needle attachment
Attach a sterile 31G × 6mm pen needle (recommended for subcutaneous research applications). Perform a 1–2 unit air prime before first use.

Step 4 — Dose dialling
Dial the required dose using the click mechanism. Each unit corresponds to a fixed volume based on your cartridge concentration.

Full reconstitution volume and concentration calculation guidance is available in our Peptide Reconstitution Guide.

❓ Frequently Asked Questions

What cartridges are compatible?
Standard 3ml borosilicate glass cartridges with a 29mm × 12mm rubber stopper. Optimised Lifestyle supplies compatible cartridges in packs of 5.

What needle gauge is recommended?
31G × 4mm or 31G × 6mm pen needles are standard for subcutaneous laboratory research applications. Available in our pack of 10.

Do I need sterile diluent?
Sterile diluent is the standard reconstitution solvent for most research peptides — it maintains sterility over multiple draws. See our reconstitution guide for step-by-step preparation.

Is this pen reusable?
Yes. The aluminium pen body is designed for extended reuse. Cartridges and pen needles are single-use and should be replaced between each cartridge/session.

What is the difference between this pen and the kit?
The Peptide Pen Kit includes the pen, cartridges, sterile diluent and needles — providing everything needed to begin a research protocol in a single purchase. This listing is the pen body only.

🔗 Complete Your Research Setup

• How to Use Your Peptide Pen (video guide) — Setup, priming and dialling, step by step
• 3ml Sterile Glass Cartridges (Pack of 5) — Compatible cartridges for this pen
• Peptide Pen Needles 31G × 6mm (Pack of 10) — Sterile single-use needles
• Peptide Pen Kit — Pen + cartridge + sterile diluent + needles bundle
• Peptide Cooler Bag — Insulated travel case with reusable gel strip, holds two pens
• 4-Vial Storage Case — Fitted foam slots for four vials

Prefer everything in one box?

The Peptide Pen Kit bundles this same reusable injector with a sterile 3 ml glass cartridge and ten 31G × 6 mm needles — everything needed to get started, and less than buying the three parts separately.

⚠️ For laboratory research use only. This device is intended for use in controlled research environments by qualified personnel. Not for personal or clinical use. Optimised Lifestyle products are supplied in compliance with UK regulations governing research equipment.

The V3 peptide pen remains the UK standard among reusable peptide pens: a 60-unit dial in 1-unit clicks, the universal 3ml glass cartridge, and the standard pen-needle thread shared across every generation.