Features:
1. New high-tech innovation eternal writing pen, HB nib, durable, 0.5mm nib
2. No ink, no dirty hands, the refill will not break, fashionable and environmentally friendly,
3. Write fluently. In theory, it can write 500,000 words continuously, which is equivalent to the writing volume of 100 pencils.
4. The refill can be replaced, convenient and practical, beautiful and generou.