Stainless Steel nib
ABS feeder and threaded housing.
Inner cap included.
7.7 mm nib shoulders
Compatibility:
1. this nib unit fits TWSBI 580 and Precision fountain pens.
2. this nib unit fits in Waldmann Edelfeder, Commander, Precieux, Solon, Tango, Tuscany and Voyager fountain pens.