Well yipee a 25 year old know all.
I sit here in a Pharm Co. that makes the shit, looks like an hospital in parts, have Dr in every other office, pin charts on the walls (I did apologise regarding the length of 25G's) and been injecting myself for the best part of 20 years. If I have to cross the T's and dot the i's to explain every detail to kids like you then so be it.
When you grow up think twice about making coments like above and just simply ask "do you mean.....?"
See above the reason why small dia. pins are not recommended for oils and certain syringe sizes.
