5 Cross Genuine Slim Gel Rolling Ball Refills, Blue, (8910-2) for all spire , new screw century and click-it gel Ink Rollerball Pens ( Bulk Pack) *Cross slim Gel ink refill cartridges for Spire, Classic Century & Click pens * Specially formulated Cross ink flows flawlessly for a superior writing experience *blue A super smooth flowing ink technology suitable for Spire, Classic, Century and Click pens.