uni-ball ZENTO UBR Ink Refill Cartridges - Compatible with Mitsubishi Pencils - Smooth Writing for Office, School & Art Projects

Ink refill for all uni-ball ZENTO Models, including the , , , and model.

Key Features

• Newly Developed ZENTO Ink: Provides a stress-free, soft writing feel while reducing ink bleed-through.
• Cushion Component (POA Surfactant): Acts as a cushion between the pen tip and paper, reducing writing friction by approximately 40% compared to conventional products.
• Attracting Particles: Draws ink particles together to minimize bleeding and show-through, ensuring crisp lines.

Specifications