PenGems standard ballpoint refill cartridges hold the same ink that you love in your pens. You can stock up so you'll never run out of ink. They are D1 ballpoint refills and will fit a wide range of compact and multi-function pens. The writing length of these refills is measured at 300 meters. Ballpoint Bold / 1.0 mm Universal D1 ball point refill Nickel silver tip and stainless steel ball Made in China Gel, Ballpoint, or Hybrid? Which Ink is Right for You?