Signo Gelstick Rollerball Pen - Limited Edition Pot of 24 - UM-170 Set of 24 Signo Gelstick rollerball pens, containing the full range of colours - 0.7mm nib writes a 0.4mm line. Comes in a Uni-branded cylindrical pencil case, perfect for taking out-and-about, or to school, college, and work. Smooth, sleek design, and vivid colours, coupled with a hugely competitive price-point, makes this a firm favourite with users of all ages. Uni's high quality "Super Ink" is not only water and light resistant, but also "Tamper-Resistant", meaning that the ink can not be washed off using chemicals and solutions used by people to fraudulently modify documents. Set contains three of each of the following colours: Black, Blue, Light Blue, Purple, Green, Red, Orange, and Pink.