Experience smooth, uninterrupted writing with the Pentel 100C-HB Pencil Lead Refill 0.5mm Tube 12. Made from a superior blend of synthetic resin, graphite, and carbon, this high-quality lead is extraordinarily strong and dense. Ideal for both writing and drawing, the Hi-Polymer lead resists breaking and never needs sharpening, ensuring you always have a sharp point to work with.