Pentel Ain C28x Mechanical Pencil Lead Refills in sleek blackout packaging. Premium Japanese high-density graphite designed for Rotring, Kaweco, and Staedtler drafting pencils.
Full range of Pentel Ain Mechanical Pencil Lead Refills. Available in 0.3mm, 0.5mm, 0.7mm, and 0.9mm sizes with HB, B, 2B, and 4B hardness grades.
Close-up of Pentel Ain "Smart Slide" case mechanism. One-handed sliding lid design prevents spills and allows easy reloading of 0.5mm and 0.7mm leads.
Close-up of Pentel Ain "Smart Slide" case mechanism. One-handed sliding lid design prevents spills and allows easy reloading of 0.5mm and 0.7mm leads.
Close-up of Pentel Ain "Smart Slide" case mechanism. One-handed sliding lid design prevents spills and allows easy reloading of 0.5mm and 0.7mm leads.
Close-up of Pentel Ain "Smart Slide" case mechanism. One-handed sliding lid design prevents spills and allows easy reloading of 0.5mm and 0.7mm leads.
Writing sample of Pentel Ain graphite showing high smudge resistance and dark line density. Ideal for left-handed writers and technical illustration.
Step-by-step illustration of using Pentel Ain Mechanical Pencil Lead
Pentel Ain Mechanical Pencil Lead Refills

Pentel Ain Mechanical Pencil Lead Refills

Regular price$3.00
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Shipping calculated at checkout.

Lead Size
Hardness
  • Low stock - 5 items left
  • Inventory on the way
  • Series: Pentel Ain Graphite (C28x Series) — the advanced 2023 successor to the legendary Ain Stein line
  • Origin: Made in Japan — exclusive Japan Domestic Market (JDM) precision engineering
  • Formula: New Ceramic Binder — molecularly re-engineered for superior break-resistance and ultra-low friction
  • Lead Sizes: 0.3mm, 0.5mm, 0.7mm, and 0.9mm — universal standard sizing for all drafting instruments
  • Hardness Range: HB, B, 2B, 3B, and 4B — high-density graphite for rich blacks and precise paper feedback
  • Quantity: 40 Leads (0.5mm / 0.7mm) | 36 Leads (0.9mm) | 25 Leads (0.3mm) per tube
  • Case Design: "Smart Slide" Blackout Case — innovative one-handed sliding lid to prevent spills and breakage
  • Features: Trifecta performance: exceptional point strength, silky-smooth glide, and superior smudge resistance
  • Use: Professional drafting, technical illustration, and daily precision writing
  • Audience: Architects, designers, and stationery purists who demand the world's smoothest writing feel

About the Pentel Ain Mechanical Pencil Lead

Pentel has redefined the chemistry of the pencil refill with the all-new Pentel Ain (C28x series). Developed to surpass the high standards of the previous "Ain Stein" line, this new series achieves a superior balance of durability and smoothness. By reinventing the internal ceramic frame that supports the graphite, Pentel has created a lead that glides across paper with noticeably less resistance while leaving a crisp, dense mark.

This is the ultimate performance upgrade for your writing toolkit. The new formula is formulated to adhere firmly to paper fibers, drastically reducing smearing and keeping your drawings, hands, and notes pristine even during intensive sessions.

Advanced Engineering & Ergonomics:

  • One-Handed "Smart Slide": The newly designed case eliminates traditional flip-tops. A simple slide of the thumb reveals the leads, allowing you to reload your pencil without breaking your creative flow.
  • Lead Protection: The internal structure is engineered to hold leads securely, reducing the "internal rattling" that causes leads to weaken or shatter inside the tube.
  • Minimalist Aesthetic: Featuring a sophisticated matte blackout design, the new Pentel Ain case is designed to complement "Stealth" and "All-Black" professional pencil collections.

While engineered by Pentel, these leads are designed to maximize the performance of any professional mechanical pencil. Whether you are using a Kaweco, Staedtler, Rotring, Uni, Zebra, or Tombow, loading them with Pentel Ain ensures you experience the absolute pinnacle of Japanese lead technology. It is not just a refill; it is a precision component for your finest writing instruments.



In Stock & Ready
Every tool is personally dispatched from our hubs within 48 hours (2 business days).

Standard Tracking (Registered Airmail)

  • Rest of the World: USD8.99 Flat Rate | FREE over USD99 (or equivalent)
  • United States: USD14.99 Flat Rate | FREE over USD150
  • Fully tracked to your doorstep via your national post or trusted local courier.

Expedited Priority (FedEx/DHL)

  • Rest of the World: USD29.99
  • United States: USD39.99
  • The fastest global route. Arrives in 3–5 business days via premium couriers.

Our Logistics Commitment
All orders are handled at our precision fulfillment centers in Hong Kong or Taiwan. For our US community, we absorb a significant portion of import tariffs to ensure your rates remain fair and transparent.

Note: Rates are listed in USD; our system automatically converts these to your local currency at checkout.

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