UPSIDEUP.store :: Replacement Round Nibs AcrylicOne MEDIUM, 2.5mm, Extend the life of our refillable Neuland markers significantly by replacing their nibs. This is what we call environmental thinking and acting. Alt + 010 Important: Replace nibs of the same kind only. Otherwise problems with the flow of ink might occur. Alt + 010 Specifications Line width: 2.5mm material: polyester, hard verison Alt + 010