UPSIDEUP.store :: Replacement Wedge Nibs 5-15 mm, for Neuland ChalkOne®, 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 Technical details Line width: 5-15 mm material: polyester