This is a set of red and blue NC-0.5 ballpoint pen refills for the ZEBRA Blen. I used to use the Blen, but I switched to the Blen 3C, so I am selling these. These are unused refills that have been stored at home for about a year. I will send them with four refills of each color in their respective bags. The bags show some wear from home storage. Please purchase only if you understand this. - Brand: ZEBRA - Colors: Red, Blue - Size: 0.5mm - Model: NC - Quantity: 4 blue, 4 red - Country of Manufacture: Japan Thank you for looking.