Pen needles 31G 5mm

Pen needles 31G x 5 mm are the perfect complement to the Reta24 peptide injector pen — and thanks to the universal thread connection, compatible with all common pen systems.

With an outer diameter of only 0.25 mm, these needles are among the finest and most widely used needle sizes for pen injections, ensuring comfortable use. Each needle is individually sterile-packed, providing reliable protection until use.

Technical details

• Strength: 31G (0.25 mm outer diameter)
• Length: 5 mm
• Packaging: individually, sterilely packaged
• Connection: Universal thread, compatible with all common injection pens
• Use: intended for single use

Perfectly matched to the Reta24 injector pen

Whether with the Reta24 Injector Pen or any other common pen system — these needles fit seamlessly and allow for precise, hygienic application.

Suitable for research purposes. Use only by informed adults. Not approved for medical use on humans.

Frequently Asked Questions

Can pen needles be reused?
No, pen needles are intended for single use — after use, the needle is disposed of carefully to avoid injury and contamination.

What pack sizes are the needles available in?
The needles are available in packs of 1, 5 or 10 — the appropriate quantity can be selected directly on the product page.