Buy Insulin Syringes Australia: U-100 Insulin Syringes 0.3 mL, 0.5 mL and 1ml, 29G and 31G

What Is a U-100 Insulin Syringe?

An insulin syringe is a small, single-use syringe with a fine needle permanently attached. The U-100 part describes its scale. It was designed for U-100 insulin, which contains 100 units per millilitre, so the barrel is marked in units rather than millilitres: 100 units equals 1 mL, and every 10 units is 0.1 mL. Nothing about the syringe is specific to insulin, and that fine, precise scale is exactly why insulin syringes became the standard tool for research peptides.

We stock four U-100 options: 1 mL with a 29G 12.7mm needle, and 1 mL, 0.5 mL and 0.3 mL with a finer 31G 6mm needle. In every case the needle is fixed to the barrel, so there is no dead space where liquid is lost between the needle and the syringe.

Insulin Syringes for Peptides

Insulin syringes for peptides do two jobs. First, reconstitution: draw bacteriostatic water from its vial and add it slowly down the inside wall of the peptide vial. Second, measurement: once the peptide is dissolved, the unit scale lets you draw an exact small volume from the reconstituted vial. A 29G needle is fine enough to pass cleanly through a rubber stopper many times without coring it, which keeps the vial sealed.

Our peptide reconstitution guide and calculator walks through both steps, and every peptide page gives a worked example of the volume of water to add.

How to Read an Insulin Syringe: 1 mL, 0.1 mL and Units

Searches like "1 ml on insulin syringe" and ".1 ml on insulin syringe" come from the same confusion: the scale shows units, not millilitres. On a U-100 syringe the conversion is simple.

This is a volume conversion only. What a given volume contains depends on how the vial was reconstituted, and we do not provide dosing advice.

Insulin Syringe Sizes and Needle Gauges

Insulin syringes differ in two ways: barrel size, which sets the most they can hold, and needle gauge, where a higher number means a finer needle. A smaller barrel spaces its markings further apart, so it reads small volumes more precisely; a finer needle passes through a stopper more easily. Choose the barrel for the volumes you work with and the needle for the job.

1ml Insulin Syringe, 29G 12.7mm

The 1ml insulin syringe with a 29G 12.7mm needle is the all-rounder, and the one to choose for reconstitution. It can transfer a full millilitre of bacteriostatic water in one draw, and the 29G needle is stiff enough to pierce a vial stopper cleanly again and again.

This is the syringe included with our bacteriostatic water bundles and starter kits. If you are buying one type of syringe to cover everything, choose this one.

1ml Insulin Syringe, 31G 6mm

The 31G 6mm insulin syringe 1ml keeps the full 1 mL capacity but uses a finer, shorter needle. A 31G needle is thinner than 29G, so it passes through a stopper with less force and leaves a smaller puncture.

Choose it when you want the 1 mL scale with the finest needle we stock. For drawing a full millilitre through a stopper repeatedly, the 29G version is the sturdier choice.

0.5 mL Insulin Syringe, 31G 6mm

The 0.5 mL insulin syringe holds up to 50 units. With half the capacity in a barrel of similar length, its markings are spaced further apart than on a 1 mL syringe, so small volumes are easier to read accurately.

It suits measuring from a reconstituted vial when you never need more than 0.5 mL at a time. For adding bacteriostatic water to a peptide vial, use a 1 mL syringe instead.

0.3 mL Insulin Syringe, 31G 6mm

The 0.3 mL insulin syringe is the smallest we stock, holding up to 30 units. It gives the finest resolution of any size, because its whole scale covers only 0.3 mL, which makes it the choice for the smallest measured volumes.

Like the 0.5 mL size it has a 31G 6mm needle. It is a measuring tool rather than a reconstitution tool: pair it with a 1 mL syringe for adding water to the vial.

Insulin Syringes With Bacteriostatic Water

If you are buying syringes to reconstitute a peptide, you also need the water. Every size of our bacteriostatic water, 3 mL, 10 mL and 30 mL, is available with one insulin syringe included, and our GHK-Cu Starter Kit and Retatrutide Starter Kit include a peptide vial, bac water and a syringe in one carton. For peptides reconstituted in dilute acid, such as IGF-1 LR3, pair the syringe with 0.6% acetic acid.

Where to Buy Insulin Syringes in Australia

Chainwell Peptide supplies insulin syringes in Australia for laboratory and research use, packed and dispatched from within Australia. Order them on their own or with your peptides and bacteriostatic water so everything arrives together.

• Same-day dispatch on orders paid before 3pm on a business day.
• Australia-wide delivery to Sydney, Melbourne, Brisbane, Adelaide, Perth, Hobart, Darwin and regional addresses.
• Sterile and individually sealed, single use.
• PayID or bank transfer, with your order number as the payment reference.

The current price is shown at the top of this page, with GST included. See our shipping policy for delivery details.

Insulin Syringe Specifications

Research Use Only

Chainwell Peptide supplies insulin syringes for use with research peptides in the laboratory. Each syringe is sterile and for single use only; do not reuse or share syringes, and dispose of used syringes in an approved sharps container. We do not provide dosing advice. By ordering you agree to our terms and conditions and research use only statement.

Insulin Syringe U-100 FAQ