JETSTREAM ballpoint pen refills, 0.38mm and 0.5mm sizes - Brand: uni - Model: JETSTREAM - Ballpoint pen refill size: 0.38mm Blue - Ballpoint pen refill size: 0.5mm Green Thank you for viewing. I bought these in bulk for a 3-color ballpoint pen, but I've used up the red ink and have green and blue left over... Would anyone like to use them? Green: 10 refills Blue: 5 refills A set of 15 refills in total. I might find more if I look through my messy desk ( ´ㅁ` ; )