... leads:185mm 4.international certification passed 1,Prouduct name:High-quality pencil leads;2,Hardness of pencil leads: 4H, ... .0mm,7.2mm;4,Type of pencil leads: High-quality graphite pencil lead ;5,Normal packaging of pencil ... regard to quality generally includes establishment of the quality policy and quality objectives, quality planning quality control, quality assurance and quality improvement.In ...