Uni 0.5mm refill, color is mint blue. One is unopened, containing 20 refills. The opened one has 18 refills remaining. They were stored in a drawer for about a year, so I'm not sure about the color quality. Please only consider purchasing if you are not concerned about the storage condition and the fact that they are used. Shipping may take some time, so please refrain from purchasing if you are in a hurry. Thank you.