Change the feel of your Kakimori Frost Rollerball Pen with the quick-swap Frost Rollerball Pen Replacement Nib.Whether you're refreshing a much-loved pen or expanding the possibilities of your pen, the Frost Rollerball Pen Replacement Nib is easy to switch out so you can find new ways to love your pen.The Rollerball Nib and are compatible with any of Kakimori's Frost Pens, allowing you to switch pen styles neatly to suit your changing needs.