Pen Needles 31G 5mm

Pen Needles 31G x 5 mm are the perfect match for the Reta24 Peptide Injector Pen — and thanks to the universal thread connector, compatible with all common pen injector systems.

With an outer diameter of just 0.25 mm, they are one of the fine, widely used needle gauges for pen injections, making every application comfortable. Each needle is individually sterile packaged, keeping it reliably protected until use.

Technical Details

• Gauge: 31G (0.25 mm outer diameter)
• Length: 5 mm
• Packaging: individually sterile packaged
• Connector: universal thread, compatible with all common injection pens
• Use: single-use only

Perfectly matched to the Reta24 Injector Pen

Whether used with the Reta24 Injector Pen or another common pen system — these needles fit seamlessly for precise, hygienic application.

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

Frequently Asked Questions

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

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