Uni Nano Diamond Mechanical Pencil Lead Refills - 0.3mm/0.5mm/0.7mm/0.9mm
Please notice the numbers of leads are different in different diameters:
0.3mm -15 pcs
0.5mm - 40 pcs
0.7mm - 40 pcs
0.9 mm - 36 pcs
For every mechanical lover, breaking off pencil leads during writing or drawing is very annoying. Uni NanoDia Pencil Lead uses new nanometer technology to create stronger and high-quality lead. It helps users to effectively avoid breaking off leads during writing or drawing.