Twsbi Diamond 540 Steel Replacement Unit Broad Point Nib - 530NIB-B
Replacement nib and feed assembly for the TWSBI Diamond 530 / 540 Fountain Pen (clear or colored demonstrator). Now you can purchase your new TWSBI Diamond 540 and have options to use the different point sizes. Don't fret if you happen to drop your pen on the nib! This replacement part will get your pen working in like-new condition again.