... .international certification passed 1,Prouduct name:High-quality pencil leads;2,Hardness of pencil leads: 4H, 3H, 2H,H,HB,B, ... trader specializing in the research, development and production of pencil leads, pencil boards, pencil and wedge joint boards, dressed lumbers, semi-finished flooring ... any of our products or would like to discuss a custom order, please feel free to contact us. We are looking ...