Uni ballpoint pen refills, set of 3. - Brand: uni - Model Name: Signo UMR-82 - Size: 0.28mm - Compatible with: Uni-ball Signo UMN-155-28, etc. Thank you for viewing. I purchased a set of 10 refills, but I won't be able to use them all, so I'm offering them to someone who needs them. * I'll include 2 extra refills as a bonus. Shipping via regular mail is included.