Thank you for viewing! Uniball ZENTO Signature Model 0.5mm Black This popular item is often out of stock in stores. This is a short-sized water-based ballpoint pen, similar to the popular Uniball One P. It's a short-bodied ballpoint pen with very easy-to-write ink, and it's the highest-grade model of the three available. It has a magnetic cap like the Kurutoga Dive, and the click sound and feel of attaching and detaching the cap is addictive. Instant purchase is OK. #0.5mm