The Good Blue Nibs Blue The classic Corsair blues are

The classic Corsair blues are lacquered over the acid-etched "rivets" and finished with the USA's wing insignia bordered in red that was briefly used in 1943

which is over 600 years old

With a great fountain pen

The O-ring around the coupler provides an air-tight seal and prevents ink from leaking out

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The Good Blue Nibs Blue The classic Corsair blues areMaybe you want to try a different nib in your R615 fountain pen. Or sadly, something bad has happened to the nib unit that shipped with your pen. Or maybe you just like our nibs so much that you want one to use in your favourite pen. As it may be. Our nib units feature standard #6 size nibs, and precision engineered feeds that are tuned to be wet they can keep up with the ink flow demands of flex nibs. We designed them to be used in our flex fountain