Art Brown Rollerball Refills for ST Dupont Pens

Art Brown 42316 refills also fits S.T. Dupont rollerball pens.  Comes in 3 colors (red, blue, black) and 4 sizes (extra, fine, medium, broad). 

Made in Germany with the same quality as official S.T. Dupont refills.  Sold as a single refill.