The frictional heat generated by rubbing the drawn lines with the special eraser on the knock part causes a chemical change that makes the ink colorless, so you can erase and rewrite it many times.
- This is a set of 8 color ballpoint pens
Off black, Rose red, Cobalt blue, Violet, Green, Sun orange, Cherry pink, Sky blue (diameter 0.5mm)
- Replacement ballpoint core type URR-100-05
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