Needle Gauge
Also known as: gauge · G · needle size
The thickness of a needle — a higher gauge number means a thinner needle; fine gauges suit subcutaneous work.
Needle gauge is the measure of a needle’s outer diameter, on an inverse scale: the higher the gauge number, the thinner the needle. A 30G needle is finer than a 25G one.
Thicker (lower-gauge) needles draw and reconstitute quickly; very fine (high-gauge) needles are used for delicate subcutaneous work. The two are often paired — a thicker needle to mix, a fine one to dispense.
RELATED TERMS
Insulin Syringe
A fine-needle syringe marked in units (100 units = 1 mL) used to measure small reconstituted peptide volumes precisely.
Subcutaneous
Into the layer of fat just beneath the skin — the route most peptide research protocols reference.
Filter Needle
A needle with a built-in filter used to draw from an ampoule or vial, trapping glass shards or particulates.
Reconstitution
The process of dissolving a lyophilised (freeze-dried) peptide in a sterile solvent such as bacteriostatic water before study.
Educational content, not medical advice. All products supplied for research purposes only — not for human consumption.