Mechanical pencil lead refill Pentel C505 HB 0.5 mm black, 12 leads

Pentel C505 mechanical pencil lead refill in HB hardness and 0.5 mm diameter offers a balance between durability and smooth writing. The refill leads come in a clear plastic tube with 12 pieces, designed for use in 0.5 mm mechanical pencils. HB grade provides medium darkness suitable for everyday writing, note-taking and general drawing tasks, delivering consistent line quality and predictable erasing behavior.

Advantages

These 0.5 mm HB leads combine moderate hardness with uniform pigmentation to produce reliable, smudge-resistant lines for routine use. The compact plastic tube protects the leads from breakage and keeps spares organized and portable. Designed to fit standard 0.5 mm mechanical pencils, the leads maintain steady performance for schoolwork, office tasks and technical sketches.

Suitable for

• Everyday writing and note-taking
• Sketching and general-purpose drawing
• School assignments and exam work
• Office documentation and annotations
• Drafting where medium line darkness is required

Key specifications

• Lead hardness: HB (medium)
• Lead diameter: 0.5 mm
• Color: black
• Quantity per tube: 12 leads
• Packaging: reusable plastic tube for storage

How to use

Open the plastic tube and load a single 0.5 mm lead into the barrel of a compatible mechanical pencil according to the pencil manufacturer’s instructions. Advance the lead by clicking the pencil mechanism; retract or remove excess lead to avoid breakage. Use light to moderate pressure for writing and drawing to extend lead life and maintain a consistent line. Replace the lead when lines become faint or the lead is fully consumed.

Usage recommendations

For best results, use with mechanical pencils specified for 0.5 mm leads and store the tube in a dry place at room temperature. When drawing fine details or doing precision work, reduce pressure to prevent snapping; for darker lines, make multiple passes rather than pressing harder.