Cross 8521 Rolling Ball Pen Refill (Blue) A smooth alternative to the free-flowing ink of a fountain pen, with the convenience of a ballpoint. Gel ink refills are available in four classic colors, and are designed for use with all Cross Selectip pens. Enjoy this Cross gel rolling ball blue refill for a smooth writing experience and mess-free ink. Rely on this long-lasting blue gel pen refill that is designed for medium-point gel pens and enhances writing performance. This Cross rolling ball pen refill has the functionality of a ball point and is an alternative to the free-flow ink of fountain pens. Gel ink rolling ball refill, blue color Point size: 0.7mm, medium point Refill for Selectip pens Made in China