Uni-ball Signo UM-100 0.5mm Waterproof Gel Rollerball Pen - Black (Box of 12 / Mitsubishi Pencil Japan)

Uni-ball Signo UM-100 0.5mm Gel Rollerball Pen (Black, Box of 12):

• Tip Size: 0.5 mm precision stainless steel tungsten carbide ball tip for crisp, ultra-fine lines.
• Super Ink: Waterproof, lightfast, and tamper-proof archival pigment ink that resists fading and chemical washing.
• Flow Performance: Smooth, consistent twin-ball ink regulation mechanism preventing skips, leaks, or ink blots.
• Packaging: Standard box of 12 pens.
• Applications: Signing legal contracts, accounting ledgers, office documentation, and exam writing.