Sharp Pencil refill leads provide smooth, consistent strokes at 1.3 mm thick. Compatible with Sharp Pencil and other standard mechanical pencils, they provide high precision with their B-grade hardness. Made from high-quality graphite and clay, they resist breakage and ensure consistent results. Packaged in a case with 12 1.3 mm leads, ideal for writing and technical drawing. The compact design allows for easy storage and quick refills. Lead diameter: 1.3 mm, B-grade hardness. Lead length: 60 mm. Composition: high-purity graphite and clay. Pack of 12 leads in a 25 x 200 mm case. Compatible with pencils from 0.3 to 1.3 mm.