... .international certification passed 1,Prouduct name:High-quality pencil leads;2,Hardness of pencil leads: 4H, 3H, 2H,H,HB,B,2B ... ,7.2mm;4,Type of pencil leads: High-quality graphite pencil lead ;5,Normal packaging of pencil lead:L*W*H:36 ... trader specializing in the research, development and production of pencil leads, pencil boards, pencil and wedge joint boards, dressed lumbers, semi-finished flooring ...