F 0.5 mm, 12 leads per tube, 12 tubes
Staedtler Mars micro carbon 250, F, 0.0197" (0.5 mm), 5.12" (130 mm), 12 pc(s), 12 pc(s)
Staedtler Mars micro carbon 250. Hardness: F, Lead diameter: 0.0197" (0.5 mm), Length: 5.12" (130 mm). Number of pencil leads per tube: 12 pc(s), Number of tubes per pack: 12 pc(s)