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Pilot Kakuno. Extra Fine. Con-70 converter. Just finished Pilot ink cartridge. It had a weird black disk in it. Does disk need to be in ink cartridge when I fill it with
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Amazon.com : Pilot Kakuno Fountain Pen, Fine Nib, Non Color Body, Pilot Fountain Pen Converter, CON-40, 2-Pieces, Sticky Notes Value Set : Office Products
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Pilot Kakuno Fountain Pen | Kakuno Fountain Pen Nib | Pilot Kakuno Converter - Fountain - Aliexpress
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Pilot Kakuno Pastel Color Fountain Pen FKA-1SR A Fountain Pen With 1 Black Ink Refill Cartridge and 1 Fountain Pen Ink Converter - Etsy
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