1.HB high pencil lead 2.Dia of pencil leadls:2.0mm 3.long of pencil leads:185mm 4. ... Prouduct name:High-quality pencil leads;2,Hardness of pencil leads: 4H, 3H, 2H,H,HB,B,2B,3B,4B, ... 0mm,4.0mm,7.2mm;4,Type of pencil leads: High-quality graphite pencil lead ;5,Normal packaging ... specializing in the research, development and production of pencil leads, pencil boards, pencil and wedge joint boards, dressed ...