Kaweco BLACK Steel nib 060 with threadThe carbon black coated steel nib is an accurate working tool with the DLC (Diamond like Carbon). This coating of the nib is highly durable. An iridium point at the tip and a precisely measured nib slot minimize the tolerances of the line widths from Extra Fine to Double Broad. The nib comes in a black tin box with a unique sleeve, whose design was created from a 70s Kaweco advertising. Thanks to the screwing mechanism in Kaweco writing instruments of