The TWSBI Vac 20A ink bottle in Black was designed for the TWSBI Vac 700R and the Vac Mini fountain pens, and allows for a complete fill of your fountain pen in one stroke. Simply fill the plastic bottle with ink and replace the cap, screw the TWSBI Vac filling fountain pen into the top of the bottle, extend the vac plunger insert and push in the plunger to fill completely. The innovative design also works with any fountain pen by removing the upper cap.
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