Pentel Ain-C28 Mechanical Pencil Leads, 0.9 mm, HB, Smooth Flow & Strong Grip, Dark Strokes, Ideal for Technical Drawing & Writing, 36 Leads Per Tube – Pack of 12 Tube

0.9 mm refers to the lead thickness, giving fuller, bolder strokes suited for drafts and diagrams. HB indicates a balanced hardness suitable for general writing and technical work—dark lines with good erase-ability without excessive smearing.

Compared with other 0.9 mm HB leads on Fepy, Ain-C28 emphasizes durability and smooth flow, with strong cores to resist breaks and clean erasing. For a close alternative, you can explore the Pentel Ain-C29 0.9 mm HB lead and the Pentel Ain-C27 0.7 mm HB lead to suit different drafting needs (see product pages for details).

Each tube contains 36 leads, and the bundle includes 12 tubes. That totals 432 leads (36 × 12) in the pack, giving you plenty for extended drafting and writing work.

Remove any old lead from the pencil, then insert a 0.9 mm Ain-C28 lead into the lead chamber. Gently advance the lead by clicking the pencil mechanism or twisting the dispenser tube until the lead protrudes slightly. Avoid forcing bent leads, and feed gradually to prevent jams or breaks.

The swivel-top tube lets you push a fresh lead forward with a simple twist, making it easy to access and dispense leads one by one while keeping the remaining leads neatly aligned inside the tube.

C28 leads are formulated for smooth, stable writing with consistent diameter and flow. They resist sudden fractures, provide clean erasing, and deliver dark, legible lines suitable for technical drawings and precise writing.

The Ain-C28 cores are designed to be strong and less prone to snapping under normal drafting and writing pressures, helping reduce lead breaks during daily use.

Yes. The HB grade allows you to erase cleanly with a standard eraser, leaving minimal ghosting while maintaining readable, dark lines for drafts and notes.

They’re ideal for technical drawing, architectural drafting, schematic diagrams, engineering notes, and general writing where darker lines and smooth flow are beneficial.

Graphite leads like Ain-C28 are standard, non-toxic writing implements designed for everyday use in offices and schools. As with any small parts, keep out of reach of small children to avoid choking hazards.

Store leads in a cool, dry place away from excessive heat or moisture. Keep the swivel-top tubes closed when not in use to protect the leads from moisture and bending, which helps prevent breakage.

With 432 leads in a 12-tube bundle, you get a favorable cost-per-lead for frequent drafting and writing. Compare the per-lead price by dividing the total bundle price by 432 to assess long-term value for your projects.

If you’re exploring other options, you may want to check variations like the Pentel Ain-C29 0.9 mm HB lead and the Pentel Ain-C27 0.7 mm HB lead for different line weight and hardness preferences. See these pages for specifics: https://fepy.com/product/pentel-ain-c29-0-9mm-lead-hb and https://fepy.com/product/pentel-ain-c27-0-7mm-hb-lead