Cross Ballpoint Pen Refill, Fine Blue, 1 per card, (8512) Fine Blue Specially formulated Cross ink flows flawlessly for a superior writing experience Blue Jewelry-quality craftsmanship Unquestionably guaranteed against mechanical failure, regardless of age Selectip gel rolling balls, porous-points (felt tips), ball-points and document markers; 0.5mm pencil leads Specially formulated cartridges and bottled inks