This replacement nib, made to the highest quality in Germany, is made of stainless steel, with a black plate finish.
To simply replace the nib on your compatible Kaweco fountain pen: grip the old nib top and feed with your fingertips and unscrew the entire nib component from the barrel. Grip the nib top and feed on the replacement nib component, and screw it into the pen until it is tight. Do not grip the nib by its sides.