The Uni-ball Signo 307 gel pen features its pigment-based ink, which bonds permanently with paper for document security and provides super-smooth writing experience. Its ink is acid-free, water-resistant and fade-resistant.
The Uni-ball Signo 307 has a cool black pen body with carbon fiber pattern. Its textured grip gives you a better control during writing. You still feel comfortable even after a long time handwriting.