Refill for Ultra Low Friction Jet Stream Inks:
The world's first revolutionary ink delivers a smooth writing experience with low writing resistance.
Also, since the ink dries quickly, it reduces the stress of getting dirty hands.
Twin ball mechanism also prevents ink backflow and includes a built-in spring tip to prevent ink leakage from reaching the nib.

Note (Disclaimer) > Please read
Product specifications may change without prior notice.
Please use it correctly according to the intended use.