The Uni-Ball Eye Micro UB-150 Rollerball Pen Black features a precision liquid pigment ink system. An advanced Uni-Flow mechanism ensures continuous, skip-free handwriting. The tamper-proof Super Ink technology resists water and fading. A transparent ink viewing window enables quick reservoir tracking. Its stainless steel micro tip handles rigorous detail workloads. It delivers an executive, smudge-proof aesthetic layout for notes.