Here is a pen that's good for lining!
Here is a Pen you can use for Lineart, or sketching. (I wouldn't really recommend using it for anything else)
You can also change it's color.
Here's an example of what it looks like with lineart only.
(it's colored)
And here's what it looks like upclose.
Here's what it looks like colored.
And here's what is looks like colored, and upclose.
And here is the pen in different shapes/colors.
Hope you enjoy! :)