Special formulations provide smooth silky ink flow for achieving even blends and bleeds with the right amount of puddling and coverage. All markers are individually UPC coded on the label. Original four-in-one design creates four line widths from one double-ended marker. The marker creates a variety of line widths by increasing or decreasing pressure and twisting the barrel. Juicy laydown imitates paint brush strokes with the extra broad nib. Gentle and refined strokes can be achieved with the fine and thin nibs. Colorless Blender.