Made in Japan using UNI's signature nano-diamond infusion process, the Nano Dia 'For Textbook' Lead Refills offer a smoother, stronger writing experience — engineered for clarity on glossy paper.
This special edition is formulated for textbook-style print: semi-gloss, coated, and often difficult to write on cleanly with regular lead. Each stroke is dark, crisp, and consistent — perfect for study notes, highlighting key points, or annotating dense material.
The leads are infused with nano-diamond particles, which enhance strength and reduce breakage without sacrificing softness or flow. Packaged in a compact slide case.
Lead size: 0.5mm
Length: 60mm each
Quantity: 40 pieces per pack
Made in Japan
Designed for students who write fast and need their notes to hold up. Smooth, reliable, and built for repetition.