Syringes with 31-gauge needles are ultra-fine, typically used for subcutaneous injections like insulin, peptides, or other medications requiring minimal discomfort. The 31-gauge needle is among the thinnest available, with a diameter of about 0.26 mm, reducing pain and tissue trauma. Common syringe capacities for 31-gauge needles are 0.3 mL, 0.5 mL, or 1 mL, designed for small-dose precision. They’re often paired with bacteriostatic water for diluting medications or alcohol wipes for skin prep.
