1) 2b mechanical pencil lead 2) 0.5, 0.7, 0.9mm x 60mm length 3) no scrape in writing 4) ... mechanical pencil lead, pencil leads, 0.5mm pencil leads, color pencil lead. (2) Hardness of pencil leads: HB, B,2B, 3B,H, 2H and so on. (3) Dia of pencil lead refill: 0.5, 0 ...