The Uni-Ball Fineliner Pen is extrememely popular with professional and beginner artists alike plus designers and at an unbeatable price this is one of the most sought after pens. These Pin range fineliners use super ink which makes what you write down waterproof, fade resistant and even tamper proof making it impossible to fraudulently change any sensitive documents. So if you like to work with other liquid based mediums such as watercolours then the ink will not smudge. Built with a nice design and strong steel nib attached, the PIN fineliner is a solid choice for writing and drawing. - Tips: 0.1mm - Single Uni Pin - Colour is Dark 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