Can 'T Finish Writing Pencil Sharpening-Free Ink-Free Black Technology Eternal Posture Pen Student Drawing Sketch Erasable Art Pencil

Description of 'not finished writing'

1. This product writes 1 m comprehensive wear about 0.005mm loss about 0.0062 mm³, writable volume about 99.011 mm³, theoretical writing about 15900 m

2. Wood pencil 1 m wear 1.8mm (International GB/T26704-2011) theoretical writing 100 m. The theoretical writing length of this product is 159 times that of one wood pencil.

"Not finished" is only relative to wood pencil, not always finished.