**Feature** We work to provide you very the best ink refills. Your satisfaction is our Pride and Purpose. Flexible plastic cartridge allows a light squeeze to get ink flowing without breaking or cracking. Our water soluble ink gives an easy cleanse . Rinse， Dry and re-install cartridge. Cartridges are International size. Smooth ink flow provides an excellent script. Black ink refills that give a steady reliable performance. AN INK CARTRIDGE THAT PROVIDES TOP PERFORMANCE. ??HAVE you had troubles with ink flow， skipping or leaking? ??TROUBLE with clogging or cleaning your fountain pen? ??OUR SOLUTION IS AN AWESOME INK CARTRIDGE AT A GREAT PRICE ??CARTRIDGE is Standard International Size and fits most fountain pens. ??FOUNTAIN PEN inks are water-soluble. A precise solution of distilled water and ink dye helps prevent clogging， drying out & leaking. ??THE INK solution itself makes cleaning easier. Rinse and clean the ink feed and nib thoroughly with cold water， allow to dry and re-install a new cartridge. ??YOUR 100% satisfaction is our pride， purpose and promise. CLICK BUY NOW and experience the top performance of our fantastic ink cartridges!!