Nope, those needles are actually a standard medical size.
We also use them in the lab for various purposes, but they're actually medical needles and syringes. We go through hundreds of them.
next time you do heroin, try a 1.6mm needle, see how well it works.
hahahahha
most of the superficial veins that these guys use are ~2-4mm diameter tops. so the IR is going to be much smaller..
Now you try to get a 1.6mm tube in there..
Not to mention, the chronics have thinner, damaged, hardened veins..
In the movie, it wasn't some body builder with his giant varicose veins, it was this thin art school female.. no way that needle would work. hahahahaha