Mechanical pencils lead refills Carioca HB black 12 pieces

Pack of 12 Carioca HB black pencil leads designed for use in mechanical and technical pencils. The HB grade offers a balance between hardness and darkness suitable for general writing, note-taking, sketching and drafting. These standard-diameter leads provide consistent line tone and reliable break resistance when used in compatible mechanical pencil mechanisms.

Advantages

These Carioca HB black lead refills deliver uniform line density and medium hardness that suits a wide range of tasks. The pack of 12 replacement leads ensures a steady supply for classroom, office or studio use, while compatibility with standard mechanical pencil systems simplifies replacement. The formulation aims for dependable performance with reduced graininess and predictable wear rate under normal pressure.

Suitable for

• Everyday writing and note-taking
• Sketching and preliminary drawings
• Technical drawing and drafting with mechanical pencils
• Schoolwork and exam conditions
• Office use where consistent line darkness is needed

Key specifications

• Graphite grade: HB (medium hardness)
• Color: black
• Quantity: 12 leads per pack
• Form: refill leads for mechanical/technical pencils
• Intended for standard-diameter mechanical pencils (check pencil compatibility)

How to use

Insert a single lead into the tip of a compatible mechanical or technical pencil following the pencil manufacturer’s instructions. Advance the lead incrementally while writing or drawing to maintain a sharp point and consistent line width. Replace leads as they are consumed; handle spare leads gently to avoid breakage and store the pack in a dry place.

Usage recommendations

For best results, use these HB leads with mechanical pencils that accept standard refill diameters. Apply moderate pressure while writing to balance line darkness and lead longevity. Keep spare leads in their original packaging until needed to prevent chipping or moisture exposure.