Ink Refill for Uniball Zento Serie Gel Pens

Extend the life of your favorite pen while making a more sustainable choice. The Uniball Zento Series Gel Pen Ink Refill is made in Japan by the legendary Mitsubishi, delivering the same high-quality writing performance you expect—without replacing the entire pen.

Filled with rich, quick-drying black gel ink, this refill provides smooth, consistent flow with minimal smudging. It pairs perfectly with Uprise Notebook’s 100gsm paper for crisp lines and a clean finish.

Choosing refills helps reduce plastic waste and supports a more intentional, long-lasting approach to stationery—one refill at a time.

Refill, reuse, and keep writing—better for your pen, your pages, and the planet.