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TWSBI fountain pen ink comes in a 70 ml glass bottle. The inner plastic insert helps draw out the ink down to the last drop, and the aluminium caps from Diamond 50 bottles also fit the cap.
It is suitable for all fountain pens, flows excellently on paper, and has a satisfactory drying time. It is neither permanent nor waterproof.
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.