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Insulin Syringes 31G × 5/16” — Box of 100Box of 100
Lab Verified
Premium Grade
Clinical Formula
Supplies & Accessories

Insulin Syringes 31G × 5/16” — Box of 100

$21.99Per Box (100ct)

1mL ultra-fine 31 gauge insulin syringes for subcutaneous peptide injection. Minimal pain, precision dosing, individually sterile-wrapped.

Key Benefits

  • 31 gauge ultra-fine needle for virtually painless injections
  • 1mL barrel with 0.01mL graduation markings for precision
  • 5/16" (8mm) length — ideal subcutaneous depth
  • Individually sterile-wrapped for safety and hygiene
1

All sales are final — no returns or refunds. See policy

Discreet, insulated shipping. All peptides are shipped cold-packed to preserve potency. Arrives within 2–5 business days.

About Insulin Syringes 31G × 5/16” — Box of 100

Precision matters in peptide administration. These 1mL, 31 gauge × 5/16" (8mm) insulin syringes are the industry standard for subcutaneous peptide injections — thin enough to be virtually painless, with clear barrel markings in 0.01mL increments for accurate dosing. Each syringe comes individually sterile-wrapped and is intended for single use only. The 31G ultra-fine needle is ideal for abdominal, thigh, and upper arm subcutaneous injections, and the 5/16" length is specifically chosen to reach the subcutaneous tissue without going intramuscular. At 100 syringes per box, this supply comfortably covers a full 8–12 week peptide protocol with doses to spare.

Quick Facts

  • FormLyophilized Powder
  • Storage2–8°C Refrigerated
  • GradeResearch / Clinical
  • Purity≥ 98%

Disclaimer

Not intended to diagnose, treat, cure, or prevent any disease. Consult a licensed healthcare provider before use.

Verified Customer Reviews

Real People, Real Results

5.0

2 verified reviews

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“Best insulin syringes I've used”

Verified

The 31G is genuinely painless. I was dreading starting injections but these are so fine I barely feel them. The graduation markings are precise and the box of 100 lasts a full protocol easily.

Lisa C.

Seattle, WA

March 2025

“Crisp, clean, and virtually painless”

Verified

Switched from a different brand and the quality difference is notable. Sharp, sterile, and the low dead space means no product waste. Exactly what you want for peptide protocols.

Rebecca H.

Miami, FL

February 2025

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For Research Purposes Only — Legal Disclaimer

All products sold by Rejuven USA Labs are intended strictly for laboratory, in-vitro, and research purposes only. They are not intended for human or animal consumption, self-administration, injection, or therapeutic use of any kind. These products have not been evaluated, approved, or authorized by the U.S. Food and Drug Administration (FDA) or any other regulatory authority for use in the diagnosis, treatment, cure, or prevention of any disease, condition, or illness. By purchasing from this website, you confirm that you are a qualified researcher or licensed professional and will use these products solely for lawful research purposes in a controlled laboratory environment. Rejuven USA Labs assumes no liability for any misuse of these products. Consult a licensed healthcare provider before making any medical decisions.