With the black Pilot Frixion Point refill you can keep using your favourite rollerball pen. This refill contains erasable Frixion refill, which disappears with friction and can be directly overwritten so you don't need an eraser and you can make corrections without paper damage. The writing width is 0.25mm and the bullet width is 0.5mm. This package contains 3 refills, suitable for the Pilot Frixion Point roller pen.