Pentel PEN50HBX Pencil Lead Refill 0.7mm Hard Black 12pk

Product Description

The PENTEL PEN50HBX is a mechanical pencil lead refill designed for drafters, students, and professionals who demand consistent line quality. Manufactured in a 0.7 mm diameter with a hard (H) grade, this refill delivers dark, clean lines with reliable density across extended writing and drawing sessions. Each tube contains 12 individual lead pieces, providing a writing length equivalent to 12 standard wooden pencils. The Super Hi-Polymer formula resists breaking under normal writing pressure while maintaining smooth, uniform marks on paper.

This lead refill is suited for general writing, technical drawing, note-taking, and light drafting work. The 0.7 mm diameter is a widely used size in professional and academic settings, balancing line precision with durability. The hard grade produces finer, lighter lines compared to softer grades, making it a practical choice for graph work, forms, and documents where smearing must be minimized. Each box contains 12 tubes, supplying a full workload of refills for office or field use.

Key Features

• 0.7 mm diameter suits a broad range of compatible mechanical pencils
• Hard (H) grade formula produces clean, consistent dark lines with low smear
• Each 12-piece tube equivalent to the writing length of 12 wooden pencils
• Super Hi-Polymer composition resists breakage under normal writing pressure
• Box of 12 tubes provides extended supply for high-volume use

Compatibility

Designed as a standard-fit refill for mechanical pencils accepting 0.7 mm lead. Confirm your pencil model accepts 0.7 mm diameter lead before loading.

Installation Notes

Loading mechanical pencil lead requires no tools. Retract or remove the existing lead tip, insert the new lead piece through the pencil barrel according to the pencil manufacturer instructions, and advance the lead to the desired writing length. Avoid forcing lead through a clogged barrel, as this is the most common cause of breakage during loading.