BD 30 gauge x 1/2" Insulin Syringes 0.3 mL with Ultra-Fine Needle, Non-Safety 100/boxBD 328431 Insulin Syringes are designed for injecting insulin into the subcutaneous tissue just under the skin. They are used by people with diabetes to self administer insulin. The syringes have a needle with ultra fine 30 gauge and a length of 12. 7mm, which means the needle is thin and short for more comfortable injections. The syringe has a capacity of 0. 3 mL, which is the amount of insulin it can hold. The barrel of the syringe is marked with