Tombow Dual Tip Brush Pen 108 Piece with Markers Storage CaseDescriptionSpecificationsShipping Each Tombow Brush Pen comes with a dual tip so you can write in fine, precise lines or broad, wide strokes. The brush nib provides flexibility over your lettering and sketching as you can achieve fluid lines of varying thicknesses, depending on how you hold your pen. Each pen contains water based ink which can be blended together to create different colours and the durable tips will self clean after blending.