Cross Ball-Point Refill For Standard Cross Ball-Point Pens - Black Medium Black Ink Medium Point Authentic Cross Refill Authentic Cross Refill Black Ink. Medium Point Selectip gel rolling balls, porous-points, ball-points and document markers Cross offers a wide range of ball-point refill sizes and colors; It was America's 1st manufacturer of quality writing instruments, and that means that we've been making pens people use 0.5mm pencil leads; specially formulated cartridges and bottled inks. Should there ever be a problem, please call a Customer Service Specialist at 1-800-282-7677.