Pentel PEN509HBBX 0.9mm Hb Lead Refills Box of 12

Product Description

The PENTEL PEN509HBBX is a box of 12 tubes of Super Hi-Polymer mechanical pencil lead refills, each tube containing 12 individual leads. Sized at 0.9 mm diameter with HB hardness, these leads are engineered for consistent dark lines with smooth, even density across both writing and drawing applications. The Super Hi-Polymer formula produces strong leads that resist breaking under normal writing pressure, reducing interruptions during use. Each 12-piece tube delivers writing length equivalent to 12 standard wooden pencils, making this format practical for high-volume users in office and school environments.

These refills are suited for everyday writing tasks in office, classroom, and drafting settings where 0.9 mm HB leads are the specified size. The HB grade balances darkness and smear resistance, making it a general-purpose choice for note-taking, forms, and freehand sketching. Sold as a box of 12 tubes, this format is well suited for supply rooms, purchasing departments, and professionals who maintain stock of consumable writing supplies.

Key Features

• 0.9 mm diameter fits mechanical pencils requiring 0.9 mm lead
• HB hardness delivers a balance of dark marking and clean erasability
• Super Hi-Polymer formula resists breakage during normal writing pressure
• Each 12-piece tube equivalent to 12 wooden pencils in writing length
• Box of 12 tubes provides bulk supply for extended use

Compatibility

Designed for use in mechanical pencils that accept 0.9 mm diameter lead refills with HB hardness.

Installation Notes

Loading lead refills into a mechanical pencil does not require tools. Advance the existing lead or clear the lead channel before inserting a new lead piece to avoid jams. Follow the pencil manufacturer's loading instructions, as advance-feed and push-button mechanisms vary by model. Store unused leads in the original tube with the cap secured to prevent breakage.