Uni-ball Signo Ink Refill / uni Mitsubishi Pencil

The Uni-ball Signo Ink Refill by uni Mitsubishi Pencil is designed for knock-type ultra-fine ballpoint pens in the Uni-ball Signo series. This gel ink refill delivers smooth writing performance in 0.38mm and 0.5mm tip sizes.Key Features

• Uni-ball Signo compatibility: Refill for Uni-Ball Signo RT1 Gel Ink Pen.
• Two tip sizes: Available in 0.38mm and 0.5mm.
• Ink colors: Blue Black and Red.
• Gel ink formula: Smooth writing with vibrant color output.