When performing a routine phlebotomy, the most common gauge needle is?

When someone is performing a very routine phlebotomy, which is the act of inserting a needle in a vein to draw blood, the most commonly used needle are needles with gauges of 20 or 21.

Explanation:

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.