Barrel size (syringe fluid volume) Insulin units Needle length Needle gauge 0.3 mL 30 units of insulin 3/16 inch (5 mm) 28 0.5 mL 30 to 50 units of insulin 5/16 inch (8 mm) 29, 30 The correct ...

Before using multi-dose syringes, it is key to ensure they are properly calibrated. To accomplish this, you can set the syringe for a 2 mL dose, use water and simply measure the output into another ...