Staedtler Pigment Liner 0.7 mm black [Pack of 5] (60481-PK5)

This is a high quality marker that I use for outlining when working with alcohol based color markers. It gives a sharp line and does not blur. Considering how much it is used, it lasts a respectable amount of time. It is also suitable for black and white scientific illustrations on kid Bristol surfaces. I use the various thicknesses but the .7 mm gets used a lot for lettering, too.

My handwriting is terrible and these make it look better. Especially useful for signing autographs on the book I just published!