The Kaweco Frosted Sport replacement spring in the colour soft mandarin is a reliable companion in all situations. Particularly easy to use, because the current spring can be unscrewed from the fountain pen without any problems to screw in the new nib. Made in Nuremberg (made in Germany) and with the nib size medium (M). The high-quality silver nib provides a pleasantly soft writing experience. The replacement filling nib in a milky orange tone fits the Kaweco Frosted Sport fountain pen series.