This black replacement Monteverde #6 fountain pen nib unit features a smooth writing German-made JoWo steel nib. Both the feed and housing are included.

It will fit into all Monteverde pens that have a #6 nib, including the Impressa, Innova, Invincia, Regatta, Ritma, and Super Mega, as well as many Conklin pens that use a #6 nib.

It does not utilize a JoWo housing, so it may not be compatible with other brands that normally accept a JoWo nib.