What Size Pin for Injecting Quads? Gauge/Length?

[grim_reapin]

I like to rotate my injections. I'll do glutes, then the next time quads and then delts. I rinse and repeat just so I'm not constantly injecting the same area. On glutes and quads I've always used 1.5" @ 23g. The delts I do the same except use only a 1". Never had probs doing it this way.