Uni-Ball EYE UB-157 Fine Liquid Ink Rollerball Pen - Tropical Set - Pack of 5 Set of five Tropical coloured UB-157 rollerball pens. 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 of using chemicals and solutions used by people to fraudulently modify documents. 0.7mm nib writes a 0.5mm line. Set contains one of each of the following colours: Purple, Light Blue, Light Green, Orange, and Wine Red. The Uni Liquid ink flow system ensures high quality, continuous writing, right down the the very last drop of ink.