You can use a 23g 1.5 for all injections. I use it for bi's, tri's, and quads with no pain. On the other hand smaller needle=less damage=less scar tissue so if you have the patients for 27g needles they would be best.
You can use a 23g 1.5 for all injections. I use it for bi's, tri's, and quads with no pain. On the other hand smaller needle=less damage=less scar tissue so if you have the patients for 27g needles they would be best.