Brush pens give more variation in line width than the usual fineliner pen. Their nibs have a large base that then tapers to your great point. Generally the nib is made of a conical piece of felt, but there are pens that have a true brush tip fabricated from unique https://how-to-draw-with-ink-pens99876.theobloggers.com/43144937/the-ultimate-guide-to-ink-pen-drawing-techniques