... , poplarLead Hardness8H,7H,6H,5H,4H,3H,2H,H,HB,B,2B,3B,4B,5B,6B,7B,8B,9B,10B,11B ... in 1988, Shangzhi Pearl Pencil Industry Co., Ltd. is a manufacturer and trader specializing in the research, development and production of ... with new clients around the world in the near future. B wooden black pencil