Montblanc does not sell individual nibs, since they could otherwise be mounted on counterfeits; a own nib swap also fails due to missing special tools and the special sealing material without which the pen leaks. An individually charged nib would, on top, be more expensive than complete sending in to nib change at the works. The recommended way is to send the pen via an authorised Montblanc specialist dealer for a factory change; a swap among collectors (BB against B, F against M) remains, without workshop solution, prone to sealing problems.