[WHAT IS IT!]: OOLY Splendid Duo fountain pen ink refills are just the thing to make sure you never run out of the most common ink collors. Works with all OOLY fountain pens including Color Write, Splendid Pens, Modern Script and Fab fountain pens [WHAT'S INCLUDED]: This fountain pen refill pack includes 6 refills, there are 3 black ink refills and 3 blue ink refills [COMPATIBLE WITH:]: These OOLY colorful fountain pen ink refills are only compatible with the OOLY Fountain Pens [SO MANY USES]: These fountain pen refills are perfect supplies for slightly older kids who can handle pens. They are great for note taking, art projects, stationery and more. Add these practical supplies to your stationery set, pen bag, or journal writing kit. Your writing and artistic expression will never be the same with these smooth-flowing and long-lasting refills [SAFE & NONTOXIC]: OOLY makes safe products for kids (and adults). These OOLY Fountain Pen refills are a great addition to school stationery kits that will take coloring to a whole new level of fun and imagination If writing doesn’t feel like writing without your Splendid Fountain Pens, we can’t blame you. Those beautifully functioning pens are easy to fall for. That’s why having fountain pen refill cartridges on hand is essential, so you don’t find yourself suddenly coming up dry. This set of Splendid fountain pen refills includes six cartridges in all: three in black ink and three in blue ink. Stock up and keep a stash of fountain pen refills at school, in the office, or anywhere you love to write.