Pentel PEN50HBBX 0.7mm Hb Lead Refills Box of 12

Product Description

The PENTEL PEN50HBBX is a box of 12 tubes of Super Hi-Polymer lead refills designed for mechanical pencils. Each tube contains 12 individual 0.7mm diameter HB-grade leads. Hi-Polymer lead delivers consistent darkness, smooth laydown, and uniform density from the first mark to the last. Each lead stick is strong enough to resist breakage under normal writing pressure and produces output roughly equivalent in writing length to a full wooden pencil. This product is used by drafters, students, technicians, and office professionals who rely on mechanical pencils for precise, reproducible lines.

These refills fit standard 0.7mm mechanical pencils used in office, classroom, and light drafting environments. The HB grade is the industry standard for general writing and notation work, balancing line darkness with lead hardness. The 0.7mm diameter is one of the most common sizes across mechanical pencil brands, making these refills a practical bulk stocking choice for supply rooms, service trucks, and workbenches where pencils are part of daily workflow.

Key Features

• 0.7mm diameter fits the most widely used mechanical pencil size
• HB hardness grade produces dark, consistent lines without excessive smearing
• Hi-Polymer formula resists breakage under normal writing pressure
• Each lead writes approximately as far as one standard wooden pencil
• 12 leads per tube, 12 tubes per box for a total of 144 individual leads
• Non-hazardous formulation suitable for general workplace and classroom use

Compatibility

Designed for use with standard 0.7mm mechanical pencils compatible with Hi-Polymer-style lead refills.

Installation Notes

Lead refills are installed by end users following the mechanical pencil manufacturer's loading procedure. No tools are required. Leads are fragile and should be stored in their tube until use to prevent breakage. Keep tubes capped and store flat or vertical to maintain lead integrity.