... graphite pencil lead 2.pencil lead hardness:B 3.pencil lead color:black 4.certificate:EN71-3 and ASTM-F963-08 1,Prouduct ... leads: 4H, 3H, 2H,H,HB,B,2B,3B,4B,5B,6B,7B,8B;3,Dia of pencil leadls:2.0mm,2 ... .1mm,2.2mm,2.3mm,2.4mm,3.0vmm,4.0mm,7.2mm;4,Type of pencil leads ... :2.2mm);6,certification of pencil leads:Tested by EN71-3, ASTM-F963-08 and R.S.c.H ...