23g 1.25″ (Injects fast but hurts more, push in all the way)
23g 1.5″ (Injects fast but hurts more, leaves a bit of space at the end)
25g 1.25″ (Painless but takes longer, needs to be put in all the way)
25g 1.5″ (Painless push in but takes longer, leaves a bit of space)