Pentel PENC25HB 0.5mm Hb Lead Refill 30-tube Pack

Product Description

The PENTEL PENC25HB is a Super Hi-Polymer lead refill designed for mechanical pencils, sold in a tub of 30 individual 12-piece tubes. Each tube contains 12 leads in 0.5mm diameter at HB hardness, delivering consistent dark, smooth lines with high break resistance. The polymer-based formula produces crisp, uniform marks suitable for precise writing and detailed drafting work. Each individual lead is rated to write as far as one standard wooden pencil, making the 12-piece tube equivalent to 12 wooden pencils. Drafters, students, and office professionals working with mechanical pencils install these as a direct consumable refill.

This lead refill is suited for standard mechanical pencil applications requiring 0.5mm HB leads, including technical drawing, note-taking, and general office writing. The tub packaging provides a bulk supply of 30 tubes, making it practical for high-volume users or supply rooms stocking multiple mechanical pencils. The HB hardness rating sits at the center of the hardness scale, balancing darkness with line sharpness for everyday writing and drafting tasks.

Key Features

• 0.5mm diameter fits standard 0.5mm mechanical pencils
• HB hardness provides balanced line darkness and sharpness
• Super Hi-Polymer formula resists breaking during normal writing pressure
• Each lead writes the equivalent distance of one wooden pencil
• 12-piece tubes sold in a bulk tub of 30 tubes per unit
• Produces consistent, smear-resistant black lines

Compatibility

Designed as a refill for mechanical pencils that accept 0.5mm diameter lead, which is one of the most common lead sizes across standard mechanical pencil models.

Installation Notes

Loading lead into a mechanical pencil requires no tools. Retract or remove the existing lead, insert a new lead into the pencil feed mechanism, and advance it until it extends to the desired writing length. Avoid forcing leads, as excessive pressure can cause breakage inside the feed tube.