... , poplarLead Hardness8H,7H,6H,5H,4H,3H,2H,H,HB,B,2B,3B,4B,5B,6B,7B,8B,9B,10B ... 2mmpencil craftunpaintedCertificationEN71-3,ASTM-F963-08Established in 1988, Shangzhi Pearl Pencil Industry Co., Ltd. is a manufacturer and trader specializing ... in the research, development and production of pencil leads, pencil boards, pencil and wedge joint boards, dressed lumbers, semi-finished ...