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0.5 mm 4B uni mechanical pencil leads
40 leads X 10 tubes
smooth, dark, strength, tough leads
They give a great balance between hardness and brittleness.
They write smoothly and cleanly without constant breakage.
These 0.5 mm 4B uni mechanical pencil leads can serve you a writing better with resilience.
Uni 0.5 Mm 4b Nano Dia Blended Hi-quality Mechanical Pencil Leads 40 Leads X 10 Tubes Totally 400 Leads of 0.5 Mm 4b - B00LRFVAQA