B12 Injection Services Subtly You Know Your Needles A Quick Nursing Guide! Today, let's understand the different types of needles and their clinical purposes Green Needle (21G) For IM injections like Best Needle For B12 Injections (Size & Gauge) PA Relief Treating Severe Vitamin B12 Deficiency B12 IM Injection like, swipe, and save for when it's your turn to do an injection on a patient Intramuscular (IM) Angle: 90 Needle Size: 2225G, 11.5 inch Med Examples: Vaccines (e.g. Tdap, Ivy Grove Surgery : Self administration of B12 injection