TWSBI Ink Bottle
Mess free fountain pen refilling with these TWSBI Ink Wells. TWSBI Diamond 50 Ink Well can be used to fill a TWSBI Diamond 580, TWSBI Diamond Mini or TWSBI Classic.
The TWSBI V20A Ink Well is for the TWSBI Vac 700 or TWSBI Vac Mini. Both ink wells can also be used with a universal converter, for other brands of pens.
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