This Uni Ball Posca Pen features an Ultra Fine 0.7mm Pin Tip loaded with highly-pigmented lightfast ink. The free-flowing lucid ink is a water-based formula that's quick-drying and waterproof and can write with ease on virtually any surface. Its ink is permanent on porous surfaces and removable on smooth surfaces such as glass, metal or plastic. Whilst its ink is dense and vibrant, it does not bleed through paper. The ultra-fine pin-shaped nib is firm and tapered to a point-producing thin, neat and precise lines for drawing and annotating. The Uni Ball Posca Pen Ultra Fine Tip pens come in a series of vibrant stunning colours to build up your own ultimate Posca pen kit. Need somewhere to store your Posca range? Give our X-Press It Marker Carry Case a try. This compact case is the perfect storage for your markers and its lightweight zip-up design makes for easy transport for on-the-go work.