Staedtler Mars Micro Carbon Mechanical Pencil LeadHigh break resistance due to flexible leadStaedtler’s Mars Micro Carbon lead glides smoothly across paper, producing dark lines. It is highly flexible and thus break-resistant. The lead is also environmentally friendly, composed of more than 90% natural raw materials. Plus, it is produced using unique ecologically-responsible manufacturing processes without PVC or softening agents.Smooth-gliding lead, jet black linesMore than 90% natural raw materialsHigh break resistance due to flexible leadMechanical pencil lead for use on paper and drawing cardSimple “12-a-go” refilling for many STAEDTLER mechanical pencilsUnique ecological manufacturing process without PVC or softening agents