The UNI-BALL Signo Gel Ink Refill is compatible for use with Uni Style Fit 3 and 5 colour pen barrels

• Using this refill, you can customise your pen to write with the colour and nib size you need

• The ink writes smoothly without spotting or smearing

• Compatible for use with Uni Style Fit 3 and 5 pens

• Acid free ink, non toxic ink