
TWSBI Diamond 580 Iris Replacement Nib - 1.1mm
Replacement nib for TWSBI 580 Iris fountain pen. This replacement nib has the same iridescent colouring as the original IRIS pens. To change the nib on your pen, unscrew the original nib and slide off the grip section sleeve. Fit the sleeve to your replacement nib and then screw in your new nib.