High break resistance due to flexible, smooth-gliding lead. Produces jet black lines.

Manufacturing process without PVC - more than 90% based on natural raw materials

Simple “12-a-go" refilling for many STAEDTLER mechanical pencils such as Mars micro 775 and graphite 779

Available in:

- 0.3mm, 0.5mm, 0.7mm, 0.9mm, 1.3mm

- 5H, 4H, 3H, 2H, H, HB, F, B, 2B