This is a set of 0.5mm refills for the Frixion Ball multi-color pen. Out of the three refills in the set, 1-2 have been used, but the refills themselves are unused. Black x 5 Red x 3 Blue x 2 Total 10 refills The regular price is about 100 yen per refill. I started using pens that don't erase, so I no longer need these. Some have been opened, but for those who don't mind. *0.38mm refills are also available. If you purchase them together, I will discount the shipping cost, so please message me.