For use with standard Cross ballpoint pens to ensure optimal performance Suitable for general-purpose writing and highly reliable for use on all paper Medium point 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. Product Description Cross Universal Ballpoint Pen Refills - Medium Point - Black - 1/Each From the Manufacturer Black Medium - Ball-point refill for standard Cross ball-point pens. Suitable for general-purpose writing, highly reliable and convenient for use on all paper.