SMOOTH PERFORMANCE: Specially formulated Cross ink flows flawlessly for a superior writing experience. RELIABLE WRITING: High quality ink formula offers consistently smooth laydown while the medium-point tip produces crisp, bold lines for excellent visibility FADE RESISTANT: Cross Rollerball Ink is tested to archival standards to resist fading and dries in a matter of seconds COMPATIBILITY: Cross Rollerball Gel Ink Refill for Selectip Pens, Medium, 8523-2 Black is compatible with the Century II, Townsend, ATX, Peerless, Wanderlust, Botanica, Bailey, Bailey Light, Calais and Edge Rollerball Pens (sold separately.) QUICK DRYING FORMULA: Cross ink only takes seconds to dry, eliminating smudges and smears ABOUT CROSS: Since 1846, A.T. Cross is a leading manufacturer of fine writing instruments. 21+ patents for pioneering creations like the propel-repel pencil and Stylographic pen Cross offers a wide range of ball-point refill sizes and colors; Selectip gel rolling balls, porous-points, ball-points and document markers Cross has re-invented writing instruments with jewelry-quality craftsmanship. Cross Full Perpetual Warranty Guarantee. All Cross writing instruments are unquestionably guaranteed against mechanical failure, regardless of age. Should there ever be a problem, please call a Customer Service Specialist at 1-800-282-7677. Product Description Gel ink refills are designed for use with Cross Selectip Rollerball Pens. Refills offer a smooth alternative to the free-flowing ink of a fountain pen, with the convenience of a ballpoint. From the Manufacturer Black Fine - Ball-point refill for standard Cross ball-point pens. Suitable for general-purpose writing, highly reliable and convenient for use on all paper.