Mechanical pencil leads Pentel C505 H 0.5 mm Black, 12 leads per tube

Pentel C505 H 0.5 mm Black replacement leads provide a consistent medium-hard line for drafting, note-taking and everyday writing. Supplied in a compact transparent tube with 12 individual leads, these 0.5 mm H-grade cores are designed to fit standard 0.5 mm clutch and mechanical pencils and deliver a fine, crisp black line without the need for sharpening.

Advantages

These Super Hi-Polymer leads resist breaking under normal writing pressure and maintain uniform hardness across the tube for predictable line density. The 0.5 mm diameter produces precise, fine lines suitable for technical work while the H hardness offers reduced smudging compared with softer grades. The lightweight tube protects leads during transport and keeps spare cores accessible for quick replacement.

Suitable for

• Technical drawing and drafting requiring fine, controlled lines
• Note-taking and everyday writing with mechanical pencils
• Schoolwork and exam writing where consistent line quality is needed
• Sketching details and annotations in documents

Key specifications

• Lead diameter: 0.5 mm
• Hardness: H (medium-hard)
• Writing colour: Black
• Quantity per tube: 12 leads
• Lead type: Super Hi-Polymer

How to use

Open the protective tube and remove a single lead core. Insert the lead into the chamber of a compatible 0.5 mm mechanical or clutch pencil according to the pencil manufacturer’s instructions, then advance the lead using the pencil mechanism. When the lead shortens, advance or replace it as needed. Store unused leads in the tube to avoid breakage and moisture exposure.

Usage recommendations

For longer life and reduced breakage, use moderate writing pressure and avoid excessive force when extending the lead. Keep spare leads in the supplied tube and replace with identical diameter and hardness cores to maintain consistent line quality.