This fantastic fineliner from Sun-Star Stationery is not just a firm, fine-tipped marker in six excellent colors: the tip opposite the fineliner works as either a subtle wavey line tip, or a perfectly spaced dashed line tip.
These wavy or dashed lines are amazing for planners, journals, and notes. You can underline, border, or organize your thoughts with a visually stunning design that is as easy to create as a simple line.