These nibs flow great with ink or paint and will fit on a few different non-graffiti products. I know they fit on CVS brand stain stick,Benadryl Itch relief pen, and probably some others that I haven't tried. I wish I could find the squeezable ones the other reviewer mentioned,but I live in the armpit of Mass and there aren't alot of arts & craft stores. The few we have get cleaned out on a daily basis.