1Optimal material: to ensure print quality. 2Strong compatibility, particles less than 20 nanometers: smooth printing, no damage to the printer. 3Inkjet smooth, vivid colors: focus on printing color, product quality recognized by the market. 4High-quality ink: clear and delicate print, high blackness, no broken lines. 5Tip cap design: Convenient for users to add ink. Just unscrew the ink cover and add it directly to the special container.