the pen today is the uni-ball jetstream 101. this is a pretty basic pen on the lower end of the price range. these are going on amazon for $6 for a package of five pens, and a dozen will set you back $14 at staples. you can also find these pens at most grocery and drugstores. the tip is 1mm. which is their version of bold, they also boast a reservoir full of what they call "super ink," which isn't ink that can emerge from a phone booth in blue tights and a red cape... wait, when was the last time you saw a phone booth? seriously, where the hell is clark kent changing into superman these days? meh.
so yeah, super ink which is "specially-formulated to become trapped in paper, helping prevent criminal check washing and other document alteration."
this pen is pretty basic, it is available in red, blue and black, has a pretty good glide, the ink does dry quickly so smudging isn't really an issue, it's clean, the ink doesn't build up on the tip, it's covered in a soft, velvety rubber or plastic for comfort and claims: "Unparalleled smoothness and effortless writing." i'm not all that convinced on that last one but whatever, these pens are pretty cheap, they last for ages, lay down a good range of values depending on pressure and will ink over pencils with little effort.
just an average pen, nothing more, nothing less.