The formula is secret the pencil is world-famous! It was with pencils that STAEDTLER's success story began. To this very day, first-class materials and manufacturing processes guarantee outstanding and unbeatable product quality. STAEDTLER Mars Lumograph is available in up to 20 degrees for writing, drawing and sketching on paper and matt drafting film. The super-bonded lead wears evenly and is easy to erase and sharpen.
