Uni-Ball One UMR Ink Refill - Compatible with Mitsubishi Pencil - Premium Smooth Writing for Office, School & Art Projects

This is a new gel ink ballpoint pen characterized by a new development of gel ink and a simple, straight barrel design. Compared to typical gel ink pens, the black ink appears even darker and stands out distinctly when reviewed later, allowing you to create impressive notes.

Note: This refill is compatible with all uni-ball one pens.