The TWSBI VAC 20A body of the bottle is made up of Plastic. Lower cap made for ALL fountain pens. The cap of the bottle can be interchanged with twsbi diamond 50 bottle cap. The bottle cap has 3 layers the upper cap, The middle cap, and the lower cap. The upper cap is for vac mini, The middle cap is for vac 700 and the lower is for all the fountain pens. Bottle cap also interchangeable with our Diamond 50 ink bottle cap. Please note that this is an empty ink bottle to be filled with your favourite ink to make it more useable.
With a history of more than 40 years of manufacturing, including producing high-end pens for other brands, Ta Shin Precision decided to start selling under their own brand, TWSBI. The name TWSBI is made up from TWS and BI. ‘TWS’ is the reversed initials of the phrase ‘San Wen Tong’, translated Hall of Three Cultures, and ‘BI’ literally means writing instrument.
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