NEW LAMY 2000 Spare Single 14K / 585 gold nib in EF, F, M, B, BB, OM, OB or OBB Info on replacing nibs: Unscrew the fountain pen in the middle (do not lose the small O-ring in between). Pull out the feeder with the spring. Then pull off the spring with your fingers and change it and put everything back together again. If you have any questions, please feel free and contact us!