1.High-quality mechanical pencil lead 2.Dia of leadls: 0.5mm 3.passed the EN71-3,ASTM963-08 4.length:60mm 90mm 120mm High-quality mechanical pencil lead refill1)size:0.5mm,0.7mm, 1.8*0.9mm, 2.0mm 2.2mm2)lead color:black3)Hardness:2H,H,HB,B,2B,3B4)passed the EN71-3,ASTM963-08 0.5mm HB high quality mechanical pencil lead