Nakaya Dorsal Fin Version 1 Midori-tamenuriThe Nakaya Dorsal Fin Version 1 in layered Midori tamenuri is hand finished in natural urushi lacquer over an ebonite body the fin on the cap is created by applying multiple layers of urushi lacquer over a period of months. Each pen is equipped with your choice of 14k solid gold nib. Our complimentary nib tuning adjusts pressure and ink flow to your personal preferences, and our optional nib customizations can add to the character and distinctiveness