Ink with transparent window for easy to see the remaining. With ire-za-·magunetto and useful. Ink 3 chamber construction and last until it wont streak. ● ● ● ● ● ● create direct liquid type standards: Fine Print Round Core Wire Width: 1.0 mm ● ink color: blue alcohol Series oil-based ink ink volume: 2.5 CC ● Material: PP with ferutoire-za-·magunetto.