“Glass Pen for Beginners: Ink & Pen Set - Cherry Blossom” Tokyo Shoten, 1100 yen “Everyday Life with a Fountain Pen: Enjoying Black Ink 6-Color Ink Set” Takarajimasha Mook, 1980 yen Only the supplement. (No book included) Water-based dye ink Ink capacity (approx.) 7mL each The mouth of the ink bottle is approximately 13mm in diameter. Although it's fountain pen ink, it can also be used with glass pens. I'm sorry, but I'm not considering selling individual items or lowering the price. Instant purchase is welcome. Ink, fountain pen, glass pen