... -3,ASTM-F963-081,Prouduct name:High-quality pencil leads;2,Hardness of pencil leads: 4H, 3H, 2H,H,HB,B ... 5B,6B,7B,8B;3,Dia of pencil leadls:2.0mm,2.1mm,2.2mm,2.3mm,2.4mm,3.0mm,4.0mm,7. ... 2mm;4,Type of pencil leads: High-quality graphite pencil ... ; 800CTS/20GP;80000GROSS/20GP(Dia of pencil leads:2.2mm);6,certification of pencil leads:Tested by EN71-3,ASTM-F963 ...