Brush pens present a lot more variation in line width than a fineliner pen. Their nibs have a wide foundation that then tapers to your wonderful stage. Usually the nib is crafted from a conical piece of felt, but you can find pens that have a true brush tip manufactured https://inkdrawingforbeginners82471.mybuzzblog.com/16576039/the-ink-drawing-for-beginners-diaries