Uni-ball Signo Gel pens are well-known for their smooth writing and high-quality ink. This UM-151 series also won't let you down. You can always find your desired colours from its wide range of colours. No matter you use its precise 0.38 mm tip for writing your meticulous notes or vivid colours for decorating your journals, it is a perfect choice. The rubber grip effectively prevents hand pain even after excessive writing. The pigment-based ink is waterproof, fade-resistant, and feather-resistant which is very friendly to lefties.