BD syringes 6 mm unused BD syringes 6 mm for insulin injection for diabetic patients. The area to be injected must be disinfected with an alcohol wipe before injection. BD syringe needles are designed to reduce pricking pain. The needle is for single use only. BD syringes 6 mm are available with capacities of 0.5 ml and 1 ml. The BD syringe box contains 100 pieces.