This mini Olympio ballpoint refill has been designed by S.T. Dupont to fit their collection of mini ballpoint pens. The single refill is black in colour and features a medium-sized nib with a rolling ball design to help produce a smooth line when writing. The high-quality ink has been specially designed by S.T. Dupont to be instantly dry on your page to help limit the number of unwanted smudges on your work. The small refill works perfectly with all mini twist mechanism ballpoint refills by Dupont.