Montblanc Fineliner Refills (B) Mystery Black 105170 – Refill Cartridge with a Broad Tip for Montblanc Fineliner and Rollerball Pens – 2 x Black Refills : Amazon.co.uk: Stationery & Office Supplies
Montblanc Ink Cartridges Pack of 8 - Assorted Colours - Pen City