Your search for "cross ballpoint" revealed the following:

Pilot FriXion Erasable Ballpoint Pen Refill - Black - Extra Fine Point - 2 Pack

Pilot"s high quality refills and accessories extend the life of Pilot products, creating ultimate value; an economic and environmentally-friendly option. ...

Pelikan 38 Ballpoint Pen Refills - Blue -

Refill for Level 5 Duo & K300

Montblanc Refills By Monteverde - Gel Pen - Black - Broad Point

Sold Individually Made to fit Montblanc ballpoint pens. Allows you to convert your ballpoint pen into a capless rollerball pen....

Visconti Smartouch 1.0mm Black Ballpoint Refill

Measures 3 7/8 long. Compatible with twist-action Visconti ballpoint pens including the Homo Sapiens Rembrandt Van Gogh and Michelangelo to...

Lamy Refills Blue Medium Point Ballpoint Pen

Fits Scribble Pico Pickup or Agenda pens.

Aurora Refills - Mini Black Medium Point Ballpoint Pen

Lamy Refills Black Fine Point Ballpoint Pen

Fits Scribble Pico Pickup or Agenda pens.

Sheaffer Fine Point Ballpoint Pen Capless Gel Black Refill by Monteverde

The new Monteverde Capless Gel refill allows you to convert your ballpoint pen into a Capless Rollerball The Monteverde refill...

Montblanc Refills By Monteverde - Gel Pen - Black - Medium Point

Sold Individually Made to fit Montblanc ballpoint pens. Allows you to convert your ballpoint pen into a capless rollerball pen....

Faber-Castell - Refill - Ballpoint - Broad Point - Black

Large capacity refill for most Faber Castell ballpoint pens. The steel tip is suitable for carbon copies.