... pencil lead hardness of lead:3B color of pencil lead:black certification:EN71-3, ASTM-F963- ... 08,R.S.c.H-3 1,Prouduct name:3B graphite pencil lead;2,Hardness of pencil leads: 4H, 3H ... , 2H,H,HB,B,2B,3B,4B,5B,6B,7B,8B;3,Dia of pencil leadls ...