Your search for "sheaffer ballpoint" revealed the following:
Pilot - Refills - Black - Medium Point - Ballpoint Pen
$ 2.50Fits Dr. Grip Center of Gravity pens.Fits Dr. Grip Center of Gravity FullBlack PureWhite Axiom and Pilot Metropolitan Ballpoint Pens....
ST Dupont - Refills Medium Black BP Refill
$ 13.75Threaded Black Medium Ballpoint Refill Suitable for S.T. Dupont Fidelio, Orpheo (full size), D.Link and Classic ballpoint pens.
Kaweco Refills Black G2 - Bag of 3 Medium Point Ballpoint Pen
$ 12.00Bag of 3. For Kaweco Dia or Full Size Special ballpens.
Cross Black Medium Point Ballpoint Pen Refill ( Pack of 2)
$ 15.00Cross Ballpoint pen refill pack. Includes 2 medium point refills with black ink.
Kaweco Refills Blue G2 - Bag of 3 Medium Point Ballpoint Pen
$ 12.00Bag of 3. For Kaweco Dia or Full Size Special ballpens.
Montblanc Refills By Monteverde - Ballpoint Pen - Blue Black - Broad Point
$ 7.00Sold Individually To fit Montblanc ballpoint pens. The Monteverde Soft Roll offers: Latest technology for the smoothest writing experience. Low...
Pilot - Refills - FriXion Red - 3-Pack - Fine Point - Ballpoint Pen
$ 5.17FriXion Erasable Ink Refills Fine (0.7mm) 3 pack red
Cross Blue Medium Point Ballpoint Pen Refill ( Pack of 2)
$ 15.00Ballpoint refill for standard Cross ballpoint pens. Suitable for general purpose writing highly reliable and convenient for use on all...