UNI 0.7mm HB leads (12-pack) offer superior strength and a firm, medium line for all 0.7mm mechanical pencils. Made with high-strength polymers, these leads minimize breakage even under high writing pressure. The HB hardness provides a comfortable glide and a balanced graphite tone, ideal for those who write with greater firmness. The 12-unit box features a simple and secure opening for easy transport in a briefcase or pencil case. The perfect choice for students and professionals who need durability and clear reading.