Diplomat nib unit for Fountain Pen Aero with stainless steel nib strength F, matt black

INTERCHANGEABLE NIB UNIT for all Diplomat Aero fountain pens with black or silver grip, available in different nib strengths. INDIVIDUAL TYPEFACE: Adjust the writing thickness of your fountain pen to your preferences by changing the grip piece of your fountain pen. Change the nib width of your fountain pen in seconds. Without complicated removal of the nib. AFFORDABLE DIY REPAIR: whether it's a bent fountain pen nib or a defective ink duct. Your writing instrument is ready to write again within seconds. Without time-consuming and costly repairs. A QUALITY PRODUCT MADE IN GERMANY: Diplomat writing instruments have been manufactured in Germany since 1922 to the highest quality standards using traditional craftsmanship.