Micro point rollerball pens deliver a precise ink lay down with rich pigmented color 0.5mm micro point roller pens bring fine detail and creativity to your writing or drawing uni Super Ink makes a strong bond with the paper, offering protection against water, fading and fraud This liquid ink rollerball pen has Uni-Flow Free Ink System for fast-flowing ink that allows quick, smooth and efficient writing Airplane safe pens withstand changes in cabin pressure, resisting leakage during flights Comes in a pack of 4 liquid micro-tip pens. Designed with black barrels and black ink.