These pen refills contain the iconic uni Super Ink™ which is used in all Uniball pens. Compatible with any of the Uni Style Fit multi-pen bodies and with the metal Meister pen body. Some Uniball ONE multi-pen bodies are also compatible with these refills as well.

uni Super Ink™ is an archival-quality pigment ink that offers extraordinary levels of water, chemical, and light resistance. It protects against water, fading, and fraud. 

Material / component: PVC / water-based ink (uni Super Ink™)
Country of origin: Japan