The Uni-Ball Fineliner Pen is extrememely popular with beginner and professional artists alike including designers and at such a great price this is one of the most high demand pens in the industry. These Pin range fineliners contain a super ink which makes what you scribble down waterproof, fade resistant and even tamper proof making it impossible to fraudulently alter any sensitive documents. Additionally if you like to work with other liquid based mediums such as watercolours then the ink will not smudge. The Pen itself has a sleek design and strong steel nib attached, the PIN fineliner is a great choice for writing or sketching in a notebook. - Tips: 0.1mm - Single Uni Pin - Colour is Light Grey - Big range of other nib sizes making the Pin range useful for illustrators and designers of all skill levels - Smooth and consistent ink flow - Features high quality Super Ink that is waterproof, fade resistant and tamper proof