Description The Edison Collier fountain pen in Nighthawk features a deep dark base with saturated shades of blue flake in the barrel and cap, silver-plated trim and a single tone #6 steel nib engraved with the Edison logo. The Collier fountain pen is one of the most popular Edison pens in the production line, and is also the largest. The Collier is not designed to post the cap onto the barrel, but uncapped at 5 3/32" long, the cigar-shaped barrel fits comfortably in the hand. The Edison Collier fountain pen uses either the included standard international converter, or short standard international cartridges for your convenience. The nib options for the pen range from steel EF through Broad, plus 1.1mm and 1.5mm stub sizes, or upgrades to an 18kt nib are available. Please Note: Some 18kt nibs are special order and will take an additional 7-10 days for delivery. Please note: Edison is undergoing a rolling change in their gold plated and regular 18kt gold nibs - Two tone nibs are being phased out in favor of Single tone gold plated or single tone 18kt gold. Some nibs are only available in single tone gold. If this is a concern, please email or call for more details.