This is a dedicated refill for the Zebra Blen ballpoint pen, featuring 0.5mm red ink. It maintains the smooth writing experience of the Blen system, which minimizes vibration during writing. It is an economical way to continue using your pen by simply replacing the empty refill. As a genuine refill imported from Japan, it is perfectly compatible with existing Blen pen bodies, serving as a reliable consumable for your writing needs.