A brush made to imitate school pencils.
I made this because I wanted a pencil brush that looked more realistic. Growing up, I wasn't really used to using art pencils and only used No. 2 pencils.
Opacity is controlled with pen pressure, so press lightly for light marks and press hard for dark marks. Like my other brush, I use 350 dpi and pt instead of px, so the brush size may be too small for your needs. Just increase the size a bit and you'll be fine. Lineart looks better with colors that are not extremely dark.