Brush pens offer extra variation in line width than the usual fineliner pen. Their nibs have a broad base that then tapers to your good position. Usually the nib is fabricated from a conical bit of felt, but you'll find pens which have a real brush suggestion fabricated from https://manuelokbrg.worldblogged.com/41191548/not-known-factual-statements-about-ink-drawing-for-beginners