It's a tool - it's useful - it solves a problem - it's truly interactive and at the same time can be decorative if desired by the user - you only ever use as much of it as you really need - it's customizable - it can bind things of a completely different nature together - it can be used for heavy-duty utility applications as well as for art installations - it allows you to physically engage with the endlessly re-producible quality of digital information - it makes whatever you have to say look more official. Choose small (1.8cm x 50m = $7.50) or large (5cm x 50m = $11.50), both sizes include marker in package.