Diamond Mini AL Mint Blue - Medium Nib

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  • Demonstrator style, pocket size.

    The TSWBI Diamond Mini  is a highly portable pocket pen. It's small and compact when capped but when you post the cap on the back of the pen you get a comfortable sized writing instrument.

    The clear resin barrel allows you to see the colour of your ink. The cap is adorned by the recognizable red TWSBI logo and the trim is a mint blue aluminium finish.

    The TWSBI Diamond AL has a built in piston filling mechanism that allows you to fill your pen by twisting the back. If used in conjunction with the Diamond 50 glass ink bottle you can easily fill your pen mess free.

  • Learn how to use and care for fountain pens with our guides.

    Anatomy of a fountain pen

    Filling from a bottle


  • Brand TWSBI
    Type Fountain pen
    Colour Clear with Mint Blue Aluminium trim
    Body Material Resin
    Trim Chrome
    Cap Type Screw cap
    Postable Cap Yes
    Cartridge / Converter Type Built in piston filler
    Cartridge Doesn't accept ink cartridges
    Ink Converter Built in piston filler
    Nib Width Medium
    Nib Material Steel
    Nib Colour Silver
    Weight (overall) 19 grams
    Length (overall) 118mm
    Length (without cap) 108mm
    Diameter (overall) 18.3mm
    Diameter (grip) 9.7mm