Replacement parts for Osprey Madison Fountain pens are available just as a Nib Unit or as a complete Assembly.
This listing provides Size 6 Regular nib units, Special Grind nib unit, Zebra G and Size 5.5 Ultra-flex Nib Unit choices.
Size 6 Ultra-flex and Size 5 Ultraflex nib units are only available as Assemblies. Line widths (cross – down strokes) associated with the nib size:
EEF – 0.45mm
EF – 0.55mm
Fine – 0.65mm
Med – 0.75mm
Broad – 0.9mm-1mm
Double Broad - 1mm - 1.2mm (great for expressing shading or sheen Inks)
Special Grinds (Steel only):
Broad Stub – 0.9 -1.0mm
Double Broad Stub (BB-S) - 1.2mm-1.5mm
Broad- Left Oblique 1mm-1.2mm
Broad- Right Oblique 1mm-1.2mm
Architect Broad – 1mm-1.2mm
Architect Double Broad (BB) – 1.2mm -1.5mm
Zoom Double Broad (BB) – 1.2mm -1.5mm