Uni NanoDia 0.5mm 3H Pencil Lead 2-Pack

Uni NanoDia 0.5mm 3H Pencil Lead 2-Pack

The Uni NanoDia 0.5mm 3H Mechanical Pencil Lead 2-pack provides the crisp durability and fine point stability required for technical drafting, architectural layouts, and accounting. Manufactured in Japan by Mitsubishi Pencil, each lead core incorporates approximately 400 million nano-diamond particles within a dense graphite structure. The hard 3H formulation resists snapping under firm writing pressure while yielding sharp, uniform, smudge-resistant lines that will not smear across notebooks, drafting vellum, or ledger paper.

Key Features

• Nano-Diamond Infused Matrix: Nanoscale diamond particles reinforce core integrity, dramatically minimizing breakages on dense paper.
• Hard 3H Technical Grade: Maintains an ultra-sharp point longer than softer grades, producing crisp, light-to-medium grey line work.
• Superior Smudge Resistance: Leaves zero loose graphite dust, keeping drafting rulers, templates, and hands clean.
• Ergonomic Sliding Dispenser: Smooth thumb-slide case allows effortless, single-lead dispensing while guarding refills against damage.
• Value 80-Lead Pack: Includes 2 protective cases with 40 leads each (80 leads total) for continuous professional drawing and study.

Specifications

• Brand: Uni
• Series: NanoDia Low-Wear Leads
• Model Number: U05202ND-3H
• Lead Diameter: 0.5 mm
• Hardness Grade: 3H (Hard Technical Drafting)
• Quantity: 80 Leads (2 Packs of 40 Leads)
• Lead Length: 60 mm
• Country of Origin: Japan

Frequently Asked Questions

• How does 3H compare to 4H and 2H lead? 3H is slightly darker and softer than 4H, but firmer and more wear-resistant than 2H, providing clean visibility with minimal point wear.
• Is this lead suitable for general writing? Yes, writers with a heavy hand who frequently break HB lead will appreciate the break resistance and clean, smudge-free performance of 3H.
• Are these refills compatible with all 0.5mm mechanical pencils? Yes, they fit all standard 0.5mm mechanical pencils, including Uni Kuru Toga, Pentel, Pilot, and Rotring models.
• Does 3H lead erase cleanly? Yes, 3H graphite erases smoothly without smearing or embedding deep into the paper grain.
• How many total leads are included in this bundle? The package contains 2 tubes of 40 leads each, providing 80 total leads.