TWSBI ink bottles are designed specifically to work with TWSBI fountain pens to provide quick, easy and clean filling of your pen.
Although designed primarily to partner the Diamond series of pens (Diamond 580 and Diamond mini), the TWSBI Diamond 50 ink bottle can be used with all makes and models of fountain pen.
Plastic bottle For use with Vac 700, Vac 700R & Vac Mini Capacity 20ml
Get that last drop of ink out! Enables clean filling of TWSBI Diamond series pens and standard-size converters (see notes below) all metal construction 100mm long
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