This is for 0.5mm refills for Frixion ballpoint pens and Pilot ballpoint pens. * Frixion: 2 black, 1 blue, and 1 red. One of the black refills has a little ink used, but there's still plenty left. The container says 0.35, but the ink is 0.5mm. This has been confirmed on the ink itself. * Pilot: 3 colors, black, red, and blue. These are new and unused. I bought them about 2-3 years ago, but I'm selling them because I don't use them.