Sailor Ink Studio Bottled Ink No. 641 - 20mL Color__IC100 Blue__pilot-namiki-ic100-fountain-pen-ink-cartridge-blue-12-cartridges-per-pack and then snap it shut

and then snap it shut

Sailor Seiboku ink cartridges are filled with deep blue pigmented ink and are designed for all Sailor cartridge/converter filling fountain pens except Chalana

Classic cigar-shaped profile

bottled ink from the UK series

Sailor Ink Studio Bottled Ink No. 641 - 20mL Color__IC100 Blue__pilot-namiki-ic100-fountain-pen-ink-cartridge-blue-12-cartridges-per-pack and then snap it shutSailor's Ink Studio #641 is a spruce blue with high shading properties. This ink along with the other wonderful Sailor Ink Studios gives a smooth flowing writing experience. This collection consists of 100 unique and vibrant colors. Water based dye ink 20 ml volume bottle Size (bottle): W34 x D34 x H58 mm Comes in a Glass bottle Package: paper box Fountain pen safe Made in Japan